This poll from 
Road Bike Rider caught our attention:
How many crashes have you had where your helmet prevented a more serious injury?
1 crash – 31%
2 crashes – 27%
3 or more crashes – 20%
I’ve crashed, but my helmet never touched anything – 16%
I’ve crashed, my helmet hit but did not help prevent a more serious injury – 1%
I’ve never crashed – 4%
The results are from about 2,200 responses to the ?January 13, 2011 question:
RBR Issue No. 464 – 01/20/11
Please, Please Wear Your Helmet–it can save your life.