I had forgotten this scene. Love it! Tell about a practical joke in a game that backfired!

We tried to get another player caught while robbing a rip-off artist's wagon. It ended with a massive stampede of people, a near magical rift, and a permanent ban from the city. Also 200,000 gold of property damage.

You all know of the fabled Belt of Genderbending, correct? Our group's witch created a pair of grieves with the same mind of enchant, but the swordsman they were for somehow got my character to try them on first. In the end, the bonus to my charisma and the extra feat of "feminine wiles" was worth the occasional "Take 1D6 against your accuracy because your breasts got in the way."

I would have been less obvious about the phrasing, myself: '...because your balance is off'

Our catgirl barbarian fulfills a lot of foolish CN Barbarian stereotypes, with the added benefit of being alarmingly friendly, if prone to sulking. She has a fondness for gnolls and fire elementals, both of whose languages she speaks, thanks to her Master Linguist feat. Thing is, they're less friendly than she, and she often manages to find ones with CR we can't handle - Elder elementals, whole tribes of gnolls, many with class levels - you get the picture. (I think the DM is trying to get her to learn to stop by giving her more opportunities to incur consequences, but she just finds it funny.) Magic is your friend; Burrow speed helps for fleeing from gnolls!

Well, there was this one time during a Dark Heresy session where the Assassin had developed a rivalry with the GM's pet NPC. We were all going our separate ways in town to stock up, and I saw the assassin stop in a crowd. I passed a note to the GM, snuck up behind the assassin, and used my Mimic talent to sound just like the NPC he hated.
His reaction was to draw a throwing knife, spin around, and throw it straight at me. Fortunately, I was quite a bit shorter than the NPC in question, so the knife sailed right over my head... and into one of the guards.

Our Cleric was an atheist conman who loved to start problems and sell solutions. He made my Shellshocked Veteran character think the Paladin was about to attack him and then the Veteran initiated a grapple. While we were grappling, a Gorgon came and nearly killed the two of us because we were caught flat footed and hit by the goring charge.

I'd be hilarious if the pizza guy became a character since they always order so much food, he'll probably be wondering why they need 20 pizzas, but I doubt this would happen... ever.

Yeah, pizza delivery people are DEFINITELY not paid enough to ask questions like "why are you ordering so many pizzas?". They want to get done and get back to the pizza place as quickly as possible, because the more deliveries they can complete during their shift, the more they get paid. Also, it's best not to ask questions you don't want an answer to, especially when most of the time the answer is going to be a lot worse than "a D&D game."