Last night we were having a Battle Royale. Everyone had characters and we were fighting to the death. It was a good time. But we did end up having about a 20 minute argument on the Garrote Strangle. I had got another character in the strangle with my Executioner. He tried to attack me with a power that would push me off and failed. He then claimed he could use a "move action" to oppose my grab and break free. I said that sounded like two standard actions to me. But I was outnumbered. So they let him make an opposed check and he broke free. This does not seem right to me, but maybe I'm wrong. Does anyone have any opinions?
Unfortunately, (or fortunately) your group was correct.
Page 243 of the Rules Compendium reads: