one of the quick ones I like to do occasionally is a deck of cards workout. assign each suit an exercise. so...spades are squats, clubs are pushups, hearts are pullups, and diamonds are burpees. shuffle the deck and go through each card, doing whatever it is. ex: 7 of clubs = 7 pushups. go through the entire deck
another one that I've done before is hindu pushups and squats. basically, do 10 hindu pushups, jump up and do 10 squats. repeat that over and over for whatever duration of time: 5 minutes, 10 minutes, etc.
the 100 burpee challenge. see how long it takes you to do 100 burpees. trust me, it's longer than you think.
I have a lot of hard miles on my body from before I realized I'm not 100% invulnerable. Now I just think I'm 75% invulnerable. -Mr. Anthony
Give me a spouse/life-partner who I don't want to punch in the throat when she talks. -Canio6