B-2s have been here before several times
Like I said, at one time or other I've seen just about every type of aircraft in the Air Force inventory flying over the Academy. It's one of the advantages of being an airplane nut and living within sight of the Academy stadium. Normally, the biggest fly-bys happen when they're hosting another service academy. I was in the stadium for the Army game a couple years ago and got to see a lot of planes. No, to me, a surprise would be something new like a big airdrop into the stadium. A lot of the cadets take parachute training (the jump plane has already been busy this morning) so that might be impressive.