On a dare I dump black and dark green slime and thick purple slop over my head and smear a few shaving foam pies in my face.
That blue inflatable thing is an inflatable bed pan that I use in my slapstick acts to up the embarrassment factor! It's fun to use and you don't have to worry about someone hitting you too hard.
The green slime was made with half water and half fart prank spray, so it smelled awful.