Video. Stabilising footage of Steve Storey's mountain bike ride down a bumpy trail almost turns it into a casual cruise around the park. That is, if you only stare at the top half of the footage. If you look at the bottom half, you'll see how much thrashing is actually going on. And if you try to look at both at the same time, you're probably going to get a little bit sick because it looks so impossibly smooth that your brain will crash.