One of the fave pastimes at E3 is getting your picture taken with the various mascots. It doesn't matter if you've never played the game that said mascot is pimping; what's important is to come home with as many shots of yourself with costumed "models" as possible.
Normally the ones getting their photos taken are the lovely scantily-clad ladies. One "model" claimed she had a stinky spot on her shoulder, where hundreds of sweaty guys had put their arm around her while their friend snapped a photo. Frogger (celebrating his 25th birthday!) was luckier, though: His costume kept him protected.