The following has nothing to do with particle accelerators, but it's in the same vein...
At the Tafe course I did some 20 years ago, we had some robust furnaces going at around 850 deg C. After being used for the lesson it was lunch time, so the teacher thought-
"Hey, why not use the residual heat in the furnace to warm up my pizza slices for lunch?!"
At 850 deg. a slice of pizza becomes a bomb of fat and water vapour, doesn't it!!!!
BOOOM! and $1500 later to repair the furnace.
Clever lad...