Yep, that's right, I said no bike. Well technically there is a bike but it's invisible which, as many experienced Trials players will tell you, makes things roughly 500% harder. You can't tell the angle you're going to land at, you can't accurately predict where your centre of gravity is. In short: it makes even the simplest of tracks tough, let alone the notorious Inferno IV.
Some perspective: our resident Trials expert FatShady can zero fault Inferno IV. No problem. When he tried with an invisible bike? It took him hours just to get past the first obstacle.
Here's some more perspective: it took me four full tries to merely finish the track, with my bike visible. I finished up with over 400 faults.
This is pure, precise, beautiful Trials technique in action. It scares me how good people can become at this game.