Practice the art of invisibility. Sneakily put yourself in the background of others' snapshots, and invite the unknowing victim to post your devious work on twitter. Yes, we're asking you to photobomb your friends, your enemies, your grandmas, or anyone else at the con. The trick is not your masterful appearance in the background of another's mementos, but getting them to upload the pic on twitter and mentioning it to the Official Penguicon Mayhem Twitter Feed (@pconMAYHEM) for a prize.