5 rds
50 burpees
82 double unders after each round.
You can do this as a partner WOD by splitting the burpees each round (one partner working at a time) but both partners must do all the double unders together after each round before starting the next round.
The Five Fifty comes from the 5 rounds of 50 Burpees and the cord is the jump rope after each round. The Burpees are to simulate the Parachute Landing Fall (PLF), which is a technique that allows a paratrooper to land safely on the ground without injury.
The 82 Double-Unders are for the 82nd Airborne Division, which is the largest Airborne unit in the US Army and , of course, jumping rope symbolizes jumping out of airplanes.