Destiny grants players a personal vehicle with a very slim grasp of how gravity works.
Normally, Destiny players use Sparrow’s to get from A to B faster than running – you can’t chase down those public events efficiently at a gentle trot.
But the hover bikes are a quiet joy in and of themselves, and some players take delight in mastering them, or working out how to do tricks. Most of these “tricks” take advantage of the fact that Sparrows rarely do what you might expect them to do, based on your knowledge of real-world vehicles.
Now, I’m no expert on physics, and I’ve never seen what happens when you drive a hover bike into a hover car, but I’m pretty sure it’s not this: