It depends on what you call a crash. Over the last 30 years I have fallen off my bike about 5 times.

1. I was speeding down hill and my front wheel slipped into the joint in the road and my wheel stuck as I was thrown over the handlebars. Ate cement, skinned both arms and broke my front teeth.

2. Walking dog while riding bike, dog went perpendicular to bike, pulled me off and I fractured my elbow

3. came off trail and did too quick of a stop to avoid getting hit by a car and fell over hurt arm, it felt like I fractured the elbow again. I was able to unclip but fell in the wrong direction. It looked really stupid, I'm sure.

4 and 5. about a month ago I rode my hybrid bike on some single track trails (first time) and fell over twice because I was going too slow and didn't anticipate stopping and couldn't unclip so I fell over and laughed all the way.

A lot of people fall off their bikes once when they first start using spd or other clipless pedals. Then they learn to anticipate stopping.