It's hard to wrap your head around sitting in a four-wheeled dolly with a 250cc motorbike engine inches away from your soft, easily torn flesh. Watch one in action, here at Killarney racetrack in Cape Town, and it still won't seem any less insane.
This is Schalk Burger Jr. practicing for a Superkart race. He has 100 horsepower at his disposal from a PVP Yamaha TZ 250 5-KE engine that will take him from 0-62 in three seconds. And he's no higher off the ground than the stomach of a small badger.
(Hat tip to Tiian!)