A military paraphernalia collector winds up accidentally setting off a grenade he was cleaning, because that's just a thing people do, and ends up with a live round of ammo in his leg. When the gang comes through to check him out, they realise the ammo could explode at any moment and that they can't bring him into a hospital. They need to quickly remove the ammo without setting it off, because of course the man is also bleeding out. It's like the most high stakes game of Operation ever played, and luckily everyone makes it out alive.
A bodybuilding competitor gets stuck in a "double bicep pose" because he's incredibly dehydrated. He's basically a human charley horse. And of course, his name is actually Charlie.
Remember when I mentioned something about folks getting their heads stuck in a microwave with cement? It's a Youtube prank gone wrong that actually happened in real life and was recreated on the show. I have no words for this.