You first get a cross grip on your opponent's lapels.(right hand on left side and left hand on right side.)
Then plant your foot right in his stomach and lay onto your back at the same time.
Now straighten your leg and pull in towards your chest w/ your arms and begin to roll backwards make sure you maintain the grip on the lapels throughout the movement..
Now continue rolling backward until you land in a mounted position and make sure you keep your hold on his lapels and you can use the grip you have to choke him by pulling on the lapels ad bringing your elbows down.
