If you practice ballancing over the front wheel, feathering the front brake as necessary, you can do pedal powered donuts. A good friend of mine in high school was a professional BMX freestylist. I saw him do it quite a few times. It really was not the most impressive trick he could do. Some of the things he did would leave you wondering how is that possible!
There really is no reason that an MB can't do it.
If you try to do it yourself, plan on crashing alot. I mean ALOT!
Helmet, gloves, shoulder pads, elbow pads, knee pads, shin guards, and hip pads are a requirement.
He really could care less what he looked like while practicing. His philosophy was at least he could get right back up and keep practicing instead of tending to repeated minor road rash and chipped bones.