Combine a wet tight track with a ton of competitive kart racers and this is what you get: A track blocking crash of approximately 83,000 or so go karts.
Karting in the rain is one of the toughest aspects of the sport, and it's because of the braking. Some classes only have rear brakes, which can give you huge oversteer on entry. Others have four wheel brakes, which will also lock up and send you straight on. So you need to be calm and precise.
Or, you can do what the drivers in this race from 2010 did and just dive into the corner and hope for the best. In this case, "the best" is probably the biggest kart crash of all time.