Just to comment on the dents on french helmets.
As for the explaination, it lyes in the technology of the helmets
You have 2 main technologies:
- Hard materials like for US or german helmets that are suppose to stop the bullet (to some extend)
- Soft materials which are aimed at absorbing the shock and diverte the bullet. French helmets pertains to this category.
That said, I much appreciated the story that is, in a way, hilarious.
At least nothing of what I saw or eard of before but who knows... : )