I was walking pass my kitchen, minding my own business when I slipped and fell with my open mouth into box of donuts.
Tim, "where's my donuts?"
Monika, " I had a little snackcident "
Bar Patron: Do you have any snacks?
Bartender: Sure. (Starts to scoop snacks and spills them all over the bar and behind the bar).
Restaurant Server: (walking by) Oops, looks like you had a snackcident!
When you go into the other room to get something or do something, and end up getting food instead. (Even though the thing you were about to get or do had nothing to do with food and only passed the kitchen.)
I went to get my headphones from the other room, ended up having a snackcident.