well one of the things we have done is pull your pants down and jump in front of a buddys trail cam so right when it snaps the picture,your mooning it but try to make it to where they cant see your face of head for that matter
then later on when your buddy checks his mem card he is shcked
one time my uncle did it and his buddy called him up and was like "some wise a$$ hunter mooned my camera and my uncle just laughed and played it off, haha