5 mu (seated)
All muscle ups using the "seated" progression i.e. rings just above head when sitting on the ground, pull up, then use legs to assist transition. Still, those were tough, as the pulls don't allow any kip so it's all you baby . . . dead hang muscle ups. And foot position was crucial to both getting through the transition and not cheating . . . still 5 at a time was all I could manage. That sh** be hard. Or as we kindly refer to them "f***ing muscle ups", with all due affection, of course . . . .