A big one for me is when you are right in the middle of a set and the guy right next to you, or a passerby farts right in your face. Now your already breathing deeply from the set and now you got a warm, juicy fart filling your lungs causing neer pass out from the fumes....you drop the weight, hurt yourself, unable to return to that spot to continue your set for fear people might think it was you...........ahhhhh