Ouch. A buddy of mine and a group of other guys did a 100-miler this weekend here in southeastern Michigan. It was all dirt road riding in Michigan. On the way back... a deer knocked jumped out of the brush and smacked right into a rider. Both the deer and the rider went down... here's my buddy's report:

http://bikefitness.net/v2/blog.php/biker-deer-crash

BTW... all these guys are well over 50.