Does anyone know for sure & where they were from?
NSAWC/Fallon.
The AF flybys are always better than the Navy. They dont get their wings yanked if they go below 1000' and over 250kts.
I sure wish that was true. Unfortunately, it isn't. I have no idea how there wasn't a thread on this, but the 20 Nov flyover at Iowa's Kinnick stadium is an example. Major crucifixion going on. Check it out on youtube. There are dozens of views. I'd post a couple, but have no idea how to do that. Look for the views from the press box.
If you're doing 330 KIAS, and crossing the stadium 900' from the turf (700' from the top of the stadium), will anyone be up in arms over it? Probably not. However, the Iowa flyby is getting 4-star attention.
Also, I am sure there are no "standing waivers" for sports/public event flyovers. 1000' above the highest obstacle within 2000' is the rule. As HD said, getting a lower waiver from the local FSDO is tough. For one, you have to have the school/sports team make the request to the FAA for their flyover to be lower. The pilots could do it, but it requires lead time.
For the AF guys, going below 1000' at a non-airport gets briefed to Flag Officers. Even if the FAA were to approve it, you still have to get HQ to buy off.
As for 250 knots... there are exceptions, based on your flight manual. For example, the T-38 cruises at 300 KIAS, as per our flight manual, so no requirement to go slower. I believe many of our fighters operate under the same rule.