The average person's version of sledding includes a plastic sled, mittens and a moderately steep hill. Furze's version, unsurprisingly, involves a canoe, some rope, and a Toyota Hilux truck. The rest isn't too hard to guess.
As you've probably realized by now, Furze is something as a speed freak. And if you aren't sure, listen to him from the canoe for the truck to keep accelerating until it hits 40mph. The new "sport" resembles a riskier version of water skiing, where you crash into ice and bushes instead of waves.