OH let me play(or would have thrown me to the wolves had the market gone the other way) and I ended up selling at 212.07. Even though I lucked out, I hope to never be in that situation again.
I'm surprised with that level (well, I'm making an assumption on your account size) of position that they didn't just liquidate it on open. Did OH contact you about it?
OH gives you a lot of leeway. Stay within the parameters of the Risk Manager and you won't get a harsh liquidation.