I had a nasty encounter with a gate on my mountain bike recently. Riding along a trail in the woods that i've riden loads before, came round a downhill bend and there was a gate there (recently put up)...I had no choice but to crash into it and vault over the fence and down the hill

3 broken ribs, fractured wrist and lots of bruises.

Totally buggered my front wheel as well

But, it's only fun until somebody falls off. Then its hilarious