I doubt he was sober.
I have low sided on the street twice, both times it was not my idea, both times drunk and in the rain (a LOOOONG time ago).
I can see some situations where it might end up better then slamming into something upright.
I once witnessed a guy lay the bike down and stand on it and surf it across some railroad tracks. 750 2 stroke triple, my friend had a 500, this guy had the 750, we worked with him.
Lay er down and surf it, why mess up your gear (jeans).
The bike was in bad shape, but he did not have a scratch on him.