Today I got to ride indoors and was putting air in a tubular when the thing blew. We run these track tyres at 145 lbs and when mine snapped it was right at 150 per the gauge. I always go 5 over and lose a bit on taking the pump off the valve. I figure this leaves my at 145. After the very loud noise I was left with very little air and even less hearing. My ears rung for an hour and even now my right ear is still ringing. I've never blown a tyre before while filling it, indoors or out. But to do so inside at such high pressure is a thrill not be missed. My hands are still shaking.