I was thinking that an interesting demonstration would be to have one of the "extreme" motorcycle riders start with a wheelie, and then transition into a front end wheelie, and then drive the motorcycle on the front wheel.  While it might be a new thing to learn, the general technique of a wheelie would apply.  On the rear wheel, they can overcenter backwards and apply the rear brake.  On the frontwheel I guess they would "undercenter" and apply the brake to regain balance.