We don't teach this in MSF because we don't want people grabbing the brake while they're turning. If you know better, by all means cover the brake :thumbup:
I remember seeing a couple of people perform the turn-brake maneuver in my first MSF class. :spank: Fortunately we were riding Buell (no so much) Blasts.
It's bad for the class participant, but it's a great attention getter for the rest of the class.