ok I am watching the philly racetrack today and a horse called Majestic Emblem is running. The purse is only 28k so it could not have been that high a race. they went 6.5 furlongs and here are the splits.

21'2
43'3
1:09'4
1:16'4

look at the first 2 splits. man that horse was flying and he actually won after posting that half on the front end.