Choose 1 of the following:
1000 swings - 45:45
1000 double unders
750 air squats
500 pushups
500 situps - 42:45 + 20 tractor tire flips...
300 wall ball
300 burpees 47:07
100 Curtis Ps

I chose Curtis P's... Accomplished 167 in 50 min

You have 50 minutes to complete as many reps as possible. You determine your pacing/rep plan. As always, your fitness level will determine your realistic goal.