Good shots with excellent timing!
Technology has come a long way ... 35 years ago, when I was at University, shooting show jumping events nearly every weekend during the season was my main source of income.
Equipment was a little less capable
, Minolta X500 and motor winder (2 fps, ridiculous today), a Tokina 4/80-200 zoom and ISO400 film sensitivity ...
For a student the investment for 20 to 30 roles of film per weekend was significant. But it was great fun and was well worth the invest! Grandparents were more than willing to pay for some decend shots of their grandchildren
!
Just for fun: here is a shot taken some years ago with my first DSLR, the 6MP Pentax IstDL2 with a MF Tokina 2.8/80-200.