I suspect the next innovation in municycles will be a reverse torque clutch for landing big drops. Under forward power it would never slip, under normal reverse loads it won't either, but under extreme reverse torque of the type you experience landing a big drop on a downhill or while going forward, it wolud offer limited slippage.

This would avoid severe backlash on the legs. But then I'm not a municyclist, so maybe it's not a problem.