Need another reason to wear a helmet?
If the previous image of a motorcycle helmet wasn’t a good enough reason to convince you to protect your head, maybe this one will. Head-on collisions can be bad enough, but if you end up falling off your bike and sliding several hundreds of feet away from the crash scene, your entire body might end up scraped down to the bone.
And that’s exactly what would’ve happened to the OP’s friend if they weren’t wearing this helmet at the time. Just look at how much of the helmet was ground down by the pavement! Now, imagine transferring that sort of damage from the helmet to the back of your head. Not a pretty thought, is it?