(I work at a college dining hall with a lot of self-serve areas. One such is the toaster for bread items. The toaster oven is on a rotating grill that flips the bread over when it gets to the end. I go over and see a student put in something that doesn’t look like bread.)
Me: “Excuse me, that doesn’t look like bread you just put in the toaster oven. What is it, please?”
Student: “Oh, no, it isn’t. It’s a hamburger!”
Me: “Really now? Why did you put a hamburger in the toaster oven?”
Student: “It was all wet so I wanted to dry it out! Great idea, right?”
Me: “Well, the burger is covered in grease and what does grease do when it’s introduced to intense heat?”
Student: “The grease melts? Duh!”
Me: “Yes, that does happen, but it also catches FIRE!”
(As I say this it little sparks of flames pop out of the oven.)
Student: “Oh, s***!” *tries to turn it off*
Me: “Yes, turn it off so it stays in a red hot oven and catches fire even more.”
Student: “Well, you should have told me not to do that or posted a sign saying not to do that!”
Me: *as I point to the very big sign saying ‘bread only’* “You mean that sign not a foot away from your face?”