Guys, I will put forward my experience. I own a P220 and started learning wheelie on it in first gear. Within a month with 15 minutes everyday while going back to home from my office, on the deserted road of my office (private road) I used to lift my bike and ride to a max of 10 metres. I was gaining confidence day by day.
One day evening I went to pick up a courier in some layout where the roads were deserted and inviting me to do wheelie. Moreover I got tempted to show off my skill to some kids playing there. So I did the wheelie a bit casually and to my surprise because of the uneven road, the bike lifted straight up in the air. I tried to hold its handle, but it looked as it will fall on me if I don't leave it immediately. I left the handle and fell onto the ground, the bike moved some 10 - 15 metres on one wheel and then fell on its right side, damaging its tail light, seat, front fairing, back fairing and exhaust pipe
I got a bent spine which is still not fully recovered after an year since this has happened. Now when I try to do a wheelie, a road block has come in my mind and I am not able to lift the wheel at all

But I am working on it hard to get back to where I left it
But I really want to overcome this! Will anyone be willing to spend few hours with me correcting the technical flaws in my wheeling technique so that I can pull safe and long wheelies? I am in Bangalore.
This was my wheelie story