This technique is used against an upper-cut punch.
When your attacker strikes, block it with a left handed downward block.
Strike with an upper-cut to your attackers stomach, this should cause them to bend down slightly.
Take your right arm round the back of their neck ready for a guillotine choke.
Grab your right wrist with your left hand.
Brace your attackers right foot with your right foot.
Now sit back and roll your attacker over your head. Use your right foot to help in the throw.
Turn onto your knees. Now sit up and apply the guillotine choke by taking your shoulders back and pushing your stomach forward.