Saw my first ever snake bite pinch flat during a Wednesday night group ride -- two symmetrical splits where the tube pinched between the bead and rim on both sides. I'd heard about it many times but never saw it before.

Fellow on a nice road bike with fairly skinny 700x25 or so tires hit a rough bit of pavement and flatted the rear. Inflation was probably a bit low for his weight (pretty big fellow, a bit overweight but mostly just a big guy) -- front had only 40 psi, no telling for sure what the rear had been. After borrowing a replacement tube and pumping it up to the max of around 120 psi he remarked it felt much harsher but he'd get accustomed to it. Probably will handle better too -- it must have felt splashy on turns at only 40 psi or so.

Reminds me of why I now prefer fatter 700x40 or so tires that can be safely ridden at 40-60 psi. I've bombed across some pretty harsh sharp edged pavement this year (unavoidable due to road construction/destruction in places I must scoot across quickly to be safe), as well as some pretty rough gravel, dirt and grassy levees. No problems with the cyclocross tires on my mountain bike or all terrain chevron tread tires on the hybrid. But they're not really underinflated for my weight (160 lbs).