Three events:
Many moons ago, when the USAF Thunderbirds still drove F-4s, I was blessed to see an airshow with them at a small rural airport. I was maybe 100 yards form the RR tracks they were using for alignment. Two of the F4s came over at tree top along the tracks - not fast, and down and dirty, wingtip to wingtip of course - and 1 was upside down!
Years later, Glenview (IL) Naval Air Station airshow, I'm driving down Lake-Cook road west bound, and there is one bright headlight in the air directly in front of me - F-14 also down and dirty. For the moment. As I watched (and tried not to hit anything on the road) it swung to my right over the airfield, sweeping its wing back and raising its gear and flaps. As I passed the airfield all I could hear was its engines as it ran north.
Traveling from the Custer Battlefield to Belle Fourche, SD, on a family vacation, I saw a speck off the horizon to the north. I watched the spec move across the horizon to my left, and then turn to move toward us. I stopped the pickup, got my boys out and we stood on the side of the road watching as the spec grew into - - - a B-1B at about 300 feet that crossed the road a few hundred yards behind us - at full throttle. Damn he was moving. And loud!
Man, I love a good airshow, even the unscheduled ones!