CrossFit 305 had this
programmed:
30 Muscle ups for time
or
10 rounds of
10 pullups
10 pushups
Scaled to
5 pullups/5 pushups - 9 rounds
5 ring rows/5 pushups - 1 round
10 ring rows/10 pushups - 5 rounds
16:32
Callus started to rip after 45 pullups, which really sucks.