get in the bath and cover yourself in food slime wax etc fully covered is extra
get in an bath filled with hundreds of icecubes and sit in there for 10 minutes wash your face and everything if u want
fill bath with cold water out ice cubes in and get in it, extra kudos for staying in longer :)
take a towel, some suntan lotion, and your camera and lay down somewhere in the street, or sidewalk on a sunny day. the public's reaction should be awesome!