Adrenaline addiction: Freestyle canyoning09/12/2016September 12, 2016Athlete Warren Verboom got bored with other extreme sports, so made up his own: Freestyle canyoning. It's a combination of canyoning and freerunning/parcour. And he added a touch of acrobatics just for the fun of it.https://p.dw.com/p/1K0OMImage: DWAdvertisement