So a month and a half ago i was experiencing the ripest farts of my life. so i grabbed a few tennis ball cans and started catching the farts to preserve them. i would then take them and seal them with black tape in order to lock in the freshness. so anyways just to make sure my fart in a can idea works i took one of the cans from a while ago, popped the lid off, and squeezed it into one of my roommates faces. to my suprise he vomitted all over the place...not just once, but several times. this idea works great and i would highly reccommend it. i'm saving a tube to give to my grandma as a xmas present. she has a good sense of humor.