This has TOTALLY happened to me. In fact, I feel like it's happening right now.

The ultimate good news/bad news scenario:

The bad news is you fall off your bike, while riding it through the woods.

The good news is you land on something soft.

The bad news is that the soft thing you landed on is a poisonous snake, who is now really really mad.

Moral of the story: There is no such thing as good news when falling off of your bike.