My neighbor kids I play with growing up, lost their mom to a motorcycle accident... in a parking lot, with a helmet on. They hit a rock and she fell off the bike going like 10mph. She hit her head on the ground in just the right way and it killed her instantly.
Motorcycles terrify me. It also doesn't help that my mom also hit a motorcyclist at a stop sign because she didn't "see" him fast enough when she came around the corner and saw the stop sign. She slammed on her breaks, and luckily for him, she just knocked him over into the ditch with out loss of life....
But, that was enough for me to realize that motorcycles aren't work the risk of life and limb.