Remember kids... always wear a helmet. (The almighty bikeradar helmet thread)

Regarding the K.E argument it is has been found that K.E is absorbed but above a suppringly low speed the amount absorbed is insignificant and make little to no difference to the injuries.

e = mc squared init.
The engergy, produced, in a crash, goes up, in a logarithmic way, relative to speed...

Fakenger, they don't call me willam shatner for no reason