Death by

death by:
    [1, 2, 3, ...] as @n
        in 1:00
            @n wall-balls (with a med-ball of: 20lb, and a target at: 10ft)
            rest

            when the goal is not reached
                stop death by

score @reps (the higher the better)

The athlete start by doing one wall ball in a minute. If he succeed, the number of reps to be done at the next minute increment by one. The WOD ends when the athlete can't do all the needed reps in a minute. The score is the number of reps done so far.