The start of the home brew kit, a lot of karting and an explosion in a bin. The karts were proper twin engined track raping carts, no little piss-pot 20mph dodgem cars here, oh no. On the straight bit, they could do around 60mph. Not bad for a couple of lawnmower engines. The explosion was from a mostly empty can of WD40 thrown into a bin of burning wood. Boom!