Too much time on his hands....
I think it's funny how so many kids have learned to bounce a ball off a wedge really well, but they still can't hit a golf ball off the ground to save their lives. LOL
The most i ever did in a row was 213. Cut off the top of the index finger on my left hand and was out of work for a month. couldn't use the hand so i learned to do that with the other. It was a long month.
It's easier than you think. Start a timer at 30 minutes and do nothing but try to bounce a ball on your wedge. In 30 minutes you'll be doing 20 in a row at the least.
I can honestly say I could easily do something more important in that 30 minutes.