I saw it in a documentary but it was a good while ago so to be honest I can't remember what the exact mechanism was or if it was just a contributing factor over longer distances. I just remember storing it away as little nugget that made sense when presented.

It's very late here and now you have me curious so I'll probably have a dig around in the morning.

Edit: I don't think it's the break thing though. Organ damage is definitely better than death if you're being chased.