[tacticalogic]

I honestly don't know of any pipe bomb that would shake a college football stadium.

Not a whole stadium, but I'll bet you could rattle some bleachers pretty good.

[DugwayDuke]

"Not a whole stadium, but I'll bet you could rattle some bleachers pretty good."

Consider the fact that the OU stadium does not have 'bleachers'. The stadium is poured concrete. Any explosion that rattled the bleachers from 100 yards away would be rather large and would have produced large scale damage in the near vicinity.