Yeah right. This demon wasn't sticking around to find out how he was planning to make him see that.

Emizel watched closely as Xemnas had apparently turned his back on him.... Interesting decision. Totally not suspicious at all. He had to be planning something if he was going to just easily 'let him go' like this. But there was no way the demon was going to lay there and wait for who knows what sort of things were waiting for him.

He inched a little to side just to test the waters first, Xemnas didn't seem like he noticed, which means...

.... Yep, he's dashing out of there now.