I read an article once. At lower temperatures, people are easy-going, over 92, it’s too hot to move, but just 92, people get irritable!
I don’t remember what set the head on the bad guy is from. The victim’s head was done with a blank yellow “head” piece and a Sharpie.
Remember, folks: Guns don’t kill minifigs! People with fine-point markers kill minifigs!