Punk started in TNA, and worked a contract in WWE, Punks finisher was the anaconda vice, a brazilian Jitsu like sleeper hold, but can also be fatal if not applied right. That's why WWE wouldn't let him use it. Although in one match he attempted it, but failed. If they let him use his jitsu knowledge, he could be very tough. This thing between him and vince is hard to read, I assume if its true, he saves face leaving this way.