The Wheelie, (counterbalance) I have only done this once and it scared the hell out of me, because I realized if I had lost “counterbalance” I’d fall backwards flat on my back in the middle of busy road. I had no intension of doing it at the traffic lights, it just happened because I was in hurry and I just throttled all my energy on the peddles and the whole bike lifted upwards and I was wheeling across the traffic lights for a brief moment until I realized and then moved forwards to place the front wheel back down on the ground.
One other thing I can do and thou it’s rather dangerous, is cycling without no hands on the (handlebars) whilst cycling up a hill. I select the first gear and let the bike slow down while approaching it, just as the bike starts to climb steadily upwards, and then (counterbalance) my weight to equal that of the hill angle, and I find it so relaxing. And I get strange looks form other cyclists who are struggling to get up the hill, because all there weight is in the front, humping and puffing away while I say, how are you or good afternoon.
This would be “Constitution Hill” at Poole which is about 5 miles west from where I live.