Back in the late 80's there was a guy who looked like the trainer Bob Klesaris.
He'd place a wager and stand by me before the race in front of the monitor.
When the gate sprung open after each race, he'd walk briskly around the monitor in a complete circle. Over and over again until the race was finished. This prevented him from watching the race pf course.
The superstition? The tension? He simply couldn't handle it.
Then there's this short guy from that same late 80's era of The Meadowlands who still attends on the weekends. During the race (usually Harness) he mimics the trotter or pacer by jumping up and down in front of the monitor.
Legs left - right. left right.
If you watch his face and his eyes during the race you can tell he's in such glee.