A mate's Dad tells me he used to have to run through the Queen Street high level tunnel when he was a wee boy to get into a gang - initiation ceremony sort of thing. Mine was a trip down the 'Death Slide'. We found (stole) a few hundred feet of high tension electrical cable (the stuff from pylons) and nailed one end to a high tree and the other end to another tree down a hill. Grab yourself a pair of chopper bike handlebars, climb the tree and you're away!
Anyone got any childhood dares that don't involve women, alcohol or stealing cars? That's just boring.