When catching a fish, use a net. Catching a bigger fish? Use a bigger net.

Maybe a time someone actually successfully used a net in combat? Or how you dealt with a baddie constantly spamming his best attack?

Actually, I just discovered the glorious combination of the arcane discovery: Knowledge is Power, and a whip in the hands of a half-orc. When your wizard can disarm and trip with near impunity, things are so much easier for your frontliners

Share a time a player tried to exploit a rule, only to discover they hadn't completely understood it.