Where/when: Brisbane, Australia: January 26 (Australia Day)

If being surrounded by hundreds of scurrying cockroaches isn't your idea of fun, then you're better off avoiding the World Championship Cockroach Races. Roach racing events include the sprint and the steeplechase - and thousands of bug lovers turn up each year to cheer on their favourite parasites.

Freakiness factor: High - Imagine seeing thousands of drunken Aussies worshipping an insect you usually trample on. Barmy!