I have a treasured picture taken at the old Monza 38 degree banked track in Italy. 1958, the year Indy cars raced. Speeds at the apex were above 160 MPH, and the pavement dropped so fast coming out of the turn, the Indy car is a foot in the air, all four wheels. ASA 1000 color film, 1/600th second exposure, and lens well opened for exactly the right exposure. The car is close enough it 1/3 fills the frame. Individual spokes of the wire wheels can be counted, and the driver, in a T shirt, the flapping of both the shirt and muscles of his arms are clearly seen.
That picture turns on my adrenalin more than half a century later. I can still hear the scream of the straight pipes die, then return a split second later as the driver saves his tires, and then accelerates down the straight to over 200 MPH.
The pictures before and after that one missed that perfect timing.
Plane spotting? Train spotting? Race car spotting? All have their high spots, but the one unique picture that you get once in a while makes it all good.