Today I tried to jump my bike over the gutter onto the footpath. I almost made it... but I didn't. The back wheel landed on the sharp edge of the gutter and left me with a square rim. Some stomping on my wheel, removing the brakes, and careful riding ensured that I was able to return home. The bike however, as you can see, needed to have a new rim sewn in before it was back to normal again.
The lesson from this? Jump higher and longer. :-)