Get a robe and lay it down on a table and put one sheet cake on it, then lay down on it and have someone else put the other sheet cake face down on your body and close the robe and roll around in the cake-filled robe.
Place one on a table, bend over it so your face is just above it, then have someone smash the other into the back of your head, forcing your face into the first cake. That woukd be epic.