My mother is French; and one year, her father came to visit us in California. He was very excited at the number and size of snails in the back yard and went out and caught a nice number of them. He put them in a pail with some cornmeal (you have to clean out their innards before you eat them, to make sure nothing toxic is in there); He put a board on top and everyone went to bed.
In the morning, My mother walked into the kitchen to find that the snails had managed to shove the board aside enough to make a jailbreak: there were snails on every surface of the kitchen, including the walls and ceiling (and a few broken shells on the floor where their traction had failed on the ceiling)
Needless to say, she was.... less than pleased.