So this Mexican dude goes to the border riding a bike with a sack over his shoulder. When the border guard asks him what's in the bag the Mexican dude says it's only sand. The border guard cuts open the bag and realizes he wasn't lying. This goes on for seven years and it drives the guard crazy. He finally quits and then goes to the Mexican dude and says : "so what is it you've been smuggling for seven years?" The Mexican dude laughs and says "bicycles sucker"