Ok, got this one from a newbie, but a great idea.
It seems that little Matty was in a big a$$ hurry to get his new sprocket on, so he decided to do it differently then everyone else does. But he may have stumbled upon something good in the process.
He started by removing the sprocket cover, then while holding the rear brake lever down, he loosened the big sprocket nut. Dam, that's easy!
The he just loosened the rear wheel, much looser on the right hand side, then he slid the rear wheel forward about an inch. At that point he just removed the sprocket with the chain still attached to it, he said it slid right off with no problems at all. Then he put the new sprocket on the chain, and slipped the chain/sprocket back on the shaft. Tighten it a bit, slide tire back, hold brake again, tighten big sprocket nut. Readjust and tighten rear wheel.
Sounds like a winner to me. he said it took about 10 minutes to do the job.
I might have to change my destructions now.