On the other hand, you can be certain no one in Dan Peterson's group of eight friends were separated. Peterson, a 25-year old Chicago graphic designer, made a flag especially for Lollapalooza, a huge flapping square emblazed with an 8-bit mushroom from the "Super Mario Bros." video games. He said he and his friends — who refer to themselves as "The Tribe" — travel from summer music festival to summer music festival, carting around a new, specially designed stick at each stop. At one festival, the stick was festooned with scores of LED lights; at another, the flag was a mash-up of a pirate flag and the official Chicago flag.