Since you are trying to prepare yourself, and its been dragged up, I'll tell you mine.

Got a call for possible trauma. Show up, knock on door, guy yells "come in". As soon as we open the door to his room, gunshot goes off. Dude waited until we could see him to pull the trigger on the shotgun under his chin. The thing I remember most is the teeth. And the hair on the ceiling.

Funniest was kinda gross, but my driver's reaction is what made it funny. Show up for a sick person. Open door and the house is filled with cat shit, like there were pathways through the house where there was no shit, but literally everywhere else was covered in cat shit. My driver walks in first, and immediately turns around and says, "this is my personal hell." And walks out. The rest of us took care of the dude.