How to Keep Bikes Off Sidewalks: Rig the sidewalk to explode.

Apparently, London has perfected a way to keep cyclists (and everyone else) from riding on the sidewalk: RANDOM EXPLOSIONS!

In this video I nicked from a post on BoingBoing, even hapless bystanders aren't safe from the wrath of hidden, underground fire devils. Get off that cell phone, citizen! MOVE ALONG!

So, there you have it. Riding the sidewalk isn't just illegal, it's potentially lethal!