You and one of your buddy eat a lot of fiber for two days,
Don't go to the bathroom for these days,
Go in a big shopping mall on a busy time,
Find a public bathroom to let finaly go your poo... DON'T FLUSH !!!
Take some poo of your buddy's toilet and put it all around your face...
Go take a walk in the mall and ask people around if they have some kleenex or wipes, because you want to remove this poo from your face...
- it will smell really bad !!!