Skill:
Double Unders, 10min practice
And then:
Test 100 Double Unders for time (or 300 singles)

Metcon:
5 Rounds for time:
10 Box Jump Overs
12 DB Push-Press (#25/15, x1)
15 V-ups
(15min timecap)

Endurance:
In Teams of 2:
100 DoubleUnders
200 Pullups
80 Double Unders
200 Pushups
60 Double Unders
200 Situps
40 Double Unders
200 Air Squat
20 Double Unders
Run 1000 m together