This is a classic exercise that can be worked into any THANG you might have in mind (or even a warmup or MARY). The Navy Seal burpee (or Seal Burpee) is a standard burpee but on the down you are executing a sequence of three merkins where on the first two, execute a knee-tuck on the up.
Bend at the waist, fingers touching your toes. Walk your hands out to a plank position while keeping one leg raised in the air. Perform a merkin, then walk your hands back, lowering your leg to the ground and touching your toes again. Stand upright and repeat the movement with the other leg for 1 rep. Rinse and repeat. Reps are determined by the Q.
With a Cindy (coupon), bend at the waist and place the Cindy on the ground a foot or two in front of you. Perform a blockee (a burpee using the Cindy followed by a thruster with the Cindy). Rinse and repeat. The distance is determined by the Q.
With your hands on a horizontally flat Cindy (coupon), position your body as if you were about to Bear Crawl or Murder Bunny, but stay in place and perform a squat. Higher rep count leads to a burner of a leg exercise!