Son, I'll tell you when you're older... 

What you're looking at is a line of volunteers frantically stuffing brochures, show guides and assorted promo materials into the tote bags every GDC attendee gets. I snapped this pic around 3:30 on Sunday, before the show opened. 90 minutes later, it was all gone like a figment of imagination.  If you're at GDC, touch your tote lovingly and know that many a papercut was suffered in assembling it.