Dog races have them. A little electronic rabbit that travels always slightly faster than the speed of racing greyhounds so the dogs go off chasing the rabbit thus resulting in a race that people bet on.
What someone should build is an electronic pace setter that has its own track right on the inside of lane 1 and you could program it to run specific splits for WR attempts (the person attempting the WR could specify their splits and they could vary and not just be linear I.E. 60s, 60s, 60s, 60s etc or 57s, 59, 61s, 53s) or whatever. You understand what I'm trying to describe.
Nike or someone should set this up. It would be a great training tool as you could have perfect pacers for workouts for OTC et al or what have you and you could also have the technology made portable (disassembles into smaller parts for transport) so you could ship the machine to Reiti or someplace.
I'm kinda drunk so I hope this makes sense and I don't completely sound like a retard.