Yeah, my dad almost died like that. On a separated bike path in very good condition, he would have only been going about 30 km/h given where it was (he can't actually remember what happened due to TBI but managed to make a full recovery after four months of hospital and rehab). Comparing the size of the foam on the impact side of the helmet vs. the other side was amazing, it was squashed to a fraction of the size. If that had been skull straight onto the concrete it would have been lights out pretty much instantly.