Seven friends once pulled this at my college cafeteria.One put a hot water bottle filled with pea soup down his chest;he sat at the head of a table, with the other six friendssitting along the sides.When the cafeteria was pretty full of people,he made a loud noise (to attract attention),stood up, bent over and squeezed his chest.This caused a huge gush of green liquid to spew all over the table;the other six immediately began to eat this green liquid.I think a lot of food went uneaten that night.