I was at the game last night, and have read and heard very little about this story (just got back home to Texas a little while ago.) I was seated in the south endzone, on the east end of that section, which was probably the best section to hear the blast. For other vets reading, you know the difference between a gunshot and an explosion, and this was a big bang - maybe similar to a 4.2 mortar shell - at least that's what it reminded me of. No question that people in my section were very distgracted from the game for a bit. We could see police on the ground headed off that way, and a few people thought they could see the smoke. I can tell you that from the location of the blast, and the layout of the stadium, nobody else could really see anything, and my son, who is in the OU band, did not think too much of the sound (OU band sits near the sideline on the west side of the stadium.)
I did not hear any second explosion, as somebody reported earlier.
My younger son was not feeling well, so we left shortly after halftime. All the gates but one were locked, although no announcement of any kind had been made in the stadium. We spend a lot of time walking around trying to get back to our car, as OUPD, Norman PD, Ok. State Police and FBI were pointing people in circles - tough to communicate in the confusion. By this time the entire stadium parking garage was taped off by police tape, and we saw one bomb sniffing dog outside of the garage. Several streets were also closed, along with a large section in the middle of the campus.
This morning, much of the campus was still taped off, at least until mid-day, and FBI was still in the area (they have and office in OKC.)
I know this does not give you any new information, but it's a little perspective from somebody who was there...
Thanks for the report, PhatHead. Sounds like the person who heard '5-10 seconds worth' might have been hearing echoes or is just plain wrong.
Four-Deuce much bigger than a a pipe for sure, well could be I should say but it does give size a bit better.