When I had the Yam RS125, when it was new, back in 84.
When we finished work at night, the blokes with bikes would give their mates a lift to the factory gates, so that they got a head start for the bus queues. I had a mate on the back one night and as we pulled away, we bumped over a ridge of broken concrete, it must have been about 3" high. The front end came right up, so I'm trying to get the front end back down and my mate is hanging onto me and pulling me off the back of the bike. The two of us sh!t ourselves. Needless to say, I changed the bars for flat ones.
About a year ago. I was waiting at a junction for a gap in the traffic. A cage driver slowed down a bit, which would give me enough time to get out. So as soon as the gap came, I shot out and gave it a handful to get up to the speed of the traffic. I also gave a wave to the bloke behind, who had let me out. So my weight was not over the front of the bike and accelerating hard, while holding on with one hand. Up comes the front of the bike.
But that is all the experience I've gained of wheelies and both were butt clenchers.