The Xchoke from Mount
The X Choke is a easy choke that can be done from the mount position. Some of the details on the x choke is make sure you steer their chin to make room to slip your other hand in to grab the lapel. A detail on finishing the choke is to widen your elbows and drop your weight forward to help tighten the choke. Placing your head to the ground will ensure your weight is forward and will help finish the choke.