The second one I have used successfully. The first one looks good, but I wonder about the likelyhood of a guillotine or side-choke by the opponent as you take the back.
I am guessing you have to throw his arm away while you have wrist control before you attempt to take the back? I am really paranoid about protecting my neck.
"In case you ever wondered what it's like to be knocked out, it's like waking up from a nightmare only to discover it wasn't a dream." -Forrest Griffin