A man on a three-wheeled motorcycle driving down a brick sidewalk in front of an exhibition hall .
Chances are about even that a street vendor is selling pretzels from his three-wheeled motorcycle .
It is impossible that a street vendor is selling pretzels from his three-wheeled motorcycle .
Chances are about even that a street vendor is selling pretzels from his three-wheeled motorcycle .
A street vendor is selling pretzels from his three-wheeled motorcycle .