At some point, the day must surely come where I am no longer surprised by what Minecraft players are able to make, but that day is not today. This is the latest creation from inventive mapmaker Disco and it even features a working clock for you to race against.
Here's what it looks like in action:
The springs are powered by TNT explosions, while you'll find that both your speed and you're jumping ability have been boosted. Keen? You can download this map here and, while you're at it, it's well worth browsing the creator's other work here. If you can get a time around the 1m 27s mark, you're doing okay.