Hamster Racing

http://en.wikipedia.org/wiki/Hamster_racing

Hamster racing is typically done with hamsters riding in miniature racecars that speed down a straight 30 foot race course. The record time is 38 seconds.[1]

Hamster racing took off in a big way in 2001 when foot and mouth disease hit Britain causing cancellation of horse races. To boost income from betting, the concept of professional hamster racing was introduced.