 In the "Kona" level, Tony Hawk mentions a "Magic Bum from Venice",  and you have to ollie (jump over) the bum five times. Each time you  do, hell find another spot, where youll have to ollie him again.  This references the California level in Pro Skater 2 where you have  to do the same thing. Also, it is revealed here that the bums name  is, indeed, "Ollie".