So, any stories when your whatever supermove end ups biting your own ass?...

Was playing a tribe of Goblin Demo-techs named "Squee" and abusing the homebrew goblin racial power "like a cockroach" that would have me replaced with an identical goblin every time i died, Turns out Claymore mines do make good melee weapons when you completely throw self preservation out the airlocks.

Had a guy who fired explosives from his hands. As it turns out, an oxygen compression plant is a bad place to fight.

Lightning bolt is very good against underwater enemies. Just remember that it's also very good against underwater allies as well.

This did not happen to me, but I read it as a story once.

They were playing some fantasy rpg, going trough a dungeon.They reach the final chamber, where they were going to fight against an evil sorceress. They were rather desperate by now, worn down by hacking their way trough the dungeon. Most of them were wounded and very frail.

But their tank, a barbarian, were doing okay. They had spent their last healing on him, and was fervently hoping he'd be able to shield the rest of the party for long enough they could take down the sorcerer and her guards.

So the first thing that happens is the sorcerer cast Charm on the barbarian causing him to join her.

Everybody goes ohshit, and prepares to get slaughtered.

The barbarian goes first, rolls to attack. Immediately fumbles.
Rolls on the fumble table; 'Attacks closest ally'.
Attacks the sorceress, crits massively.

With a mighty swing of his gigantic two handed sword, the ensorcelled barbarian accidentally decapitates his new (and surprised) mistress.

the first time I did a mecha campaign only 2 sessions this happened. I had made the mistake of being like "yeah whatever just pitch your mech idea to me" so our team consisted of a dumbass in a huge mech with a shotgun, a tiny sniper mech, a pilot from Titanfall, and a huge battleship. I made the mistake of allowing the sniper and pilot have a belt of grenades including gravity grenades. during our second session they somehow managed to combine every single gravity grenade in their possession and the gravity beam on the battleship to create a black hole. I made sure to not allow gravity weapons next time

One time when I was playing a fire-specialized sorcerer the DM had a trap that was a room entirely made of metal. Walls, floor, ceiling, doors- everything. So I cast one of my more powerful spells in the hopes of destroying the wall, which had worked during the last session when he'd trapped us in a similar trap made of stone. I killed three of my six allies that day, plus nearly roasted myself.

Yo Dawg. I heard you liked stories about backfires, so here's a story about how an attempted backfire caused a backfire to backfire.

My friends and I are playing NWod. During this campaign, I am playing as the glorious hunter, Bubba Joe the Redneck. Bubba Joe wasn't exactly the smartest man in the world, but there were a few things he was very good at- drinking, fighting while drunk (which was all the time), using a shotgun, and most importantly, handling explosives.

I'd already been using explosives to great effect by the time the incident occurred. Enemy chasing us? Boom. Need to level a small warehouse? Boom. Not sure what enemies are waiting behind closed doors? Open the door, toss in a stick, close the door, boom.

Needless to say, my GM was getting irritated with my "explosives solves everything" philosophy.

So we go into the base of the BBEG, which coincidentally happens to be located underneath the warehouse I explodified (hee hee). As we get to the end, the GM gave us a puzzle involving switches and doors. Bubba Joe, not the brightest, soberest, or most patient man, got bored, and every so often would light up his dynamite sticks to prepare to do what they should have done all along- blast the doors down. When he would, the GM would continue a countdown, and the party would hastily put out the fuse so we didn't explodify ourselves.

After we finally solve the puzzle, the door opens to bring in the BBEG himself, a powerful Vampire flanked by two Minotaur-ish chimera guards. He takes a moment to monologue, then Bubba Joe gets bored and tosses a stick of dynamite at him.

He catches it.

At this point, the party is going "oh crap" because the GM is preparing to roll to throw it back. It is then that something clicks in the back of my head.

"Hey wait a minute. That's the dynamite I was lighting earlier. Shouldn't the fuse be shorter?"

The room goes silent.

Long story short, the BBEG didn't roll high enough to get rid of the explosive in time and it went off in his hand, nearly killing him outright, vaporizing one of his minotaur guards, and severely injuring the other. The following battle was a curb-stomp in favor of the heroes.

I have never been allowed to use explosives in a campaign since.

In a pathfinder campaign I was running a kitsune fey sorcerer named Takashi who was frightfully good with enchantment spells. The save DCs were stupidly high. One of his favorite spells was feeblemind, because the save DC got even higher when cast at an arcane caster.

Well, one game he cast feeblemind at an enemy wizard that he didn't know had spell turning up. Takashi needed to roll a 20 to save against his own spell. He failed, setting his INT and CHA to 2, and spent the rest of the session drooling and playing with a magical statue that casts random spells on people who touch it.

one game we had been running with pretty strong strategies and out witting our foes. We were up against a dragon and I had an archer companion through leadership (not my cohort just one of my mooks) He scored the killing blow, and leveled, the gm had decided to award the xp to him because he triple critted the dragon before we could get into combat range. In short my strategy of having cover fire from my troops screwed the party out of a lot of xp. On the plus side we got a high level archer mook out of it.

My players' insistence on having at least as many hirelings as players translated into a bit of a depression in their xp gains. On the bright side, they now have some rather capable henchmen on hand...

Uhhh, that is bad, Blindness and inmobilization... Those two are bad effects, what is left? Something that make him unable to attack? maybe a poison or mute?

that's one useful free action.

I say that to take out all the mooks in one turn, it was worth the risk.