For time and for fun:
10K run with interruptions: Around every 10 minutes, everyone stops and does the next item on this list:
– 800m piggyback ride/partner carry (pairs can switch off as necessary until distance is covered; if an odd number, two people carry the third person together, anyhow)
– 15 handstand push-ups (partner holds legs upright)
– 15 partner back squats (put partner on back)
– 50 push-ups
– 50 walking lunges
– 100 squats