Anything you can do I can do better. Pick an opponent.
Tabata style (30 seconds of work / 10 seconds of rest – 1 minute rest between the 4 movements):
Best 2 of 3 wins for 4 different movements. Each person picks 2 movements they think they can beat their opponent at.
Body weight deadlift, pushups, pullups, sittups, airsquats, cal row, burpees, slamballs, kb swings, body weight back squat, tire flips, lunges, double unders, SDHP (75# / 55#), wallball