Neck Brace. Digging into back of neck when falling on back?

Has anyone fallen flat on their back while wearing a neck brace? Doesn't that kind of a fall shove the neck brace into the back of your neck? Especially with the braces that have that long protruding plastic flap in the back as shown:

http://www.dirtrider.com/wp/wp-conte...9/25322222.jpg

I was testing out an Atlas neck brace at a store and i tried lying flat on my back . You can already feel the hard plastic applying pressure to your neck. The flap on the atlas brace back area seems shorter than usual too.

And what if you fell into a sliding position. Wouldn't that drag the neck brace towards the top of your head or cantilever it into your jaw (if sliding the other way?)

Wouldn't it make more sense to make the back area more like the humps on those race suits:

http://www.dainese.com/system/resour...edia/gobba.jpg

Seems like that would at least prevent the dragging issue.

I noticed this neck brace from europe when researching:
https://www.youtube.com/watch?v=v1MjfxqXL_0

Anyone tried this. Looks like it's made of a foam like material instead of hard plastic. Maybe this might also help dampen the kind of thing I'm worried about?