Flight simulator

“Double-Unders
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 45, 40, 35, 30, 25, 20, 15, 10, 5”

If you miss have to redo the set before moving on.
10 minutes total (would be 500 double under if you finish)

Excerpt From
HWPO
Mat Fraser
https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewBook?id=0
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