10x100 yard sprints, rest 10-15 seconds, run backwards back to the starting point (another 100 yards)

Modification:

8x80 yard sprints (& 80 yard backward run)

1 - 14.70
2 - 14.91
3 - 14.36 - Best
4 - 14.86
5 - 15.72 - Worst
6 - Rest
7 - 15.09
8 - 15.15
9 - Rest
10 - 14.76