Offer a piece of Gum to everyone if you've got it. I mean isn't that common courtesy? Well, it won't be courteous once they get a load of what you've got inside that pack of Gum. As they start to pull out a piece, a nasty, Cockroach jumps on their finger. You load the stick of Gum with a Prank Cockroach into the pack and then it activates when pulled out.