I see what you mean, it is very abrupt - I basically got lazy near the end.
If I get around to editing it I'll also make the eyes close slower.
My recommendation is this:
after the eyes disappear, have the purple flame/smoke, whisp away and fill the container, eventually swirling into the corners until it disapates. I can see it, but its hard to describe. I think the end of the loop is too abrupt. I love how it appears with the flash of the eyes, but the disappearance is more abrupt than the appearance. It somwhat negates the while "I AM EVIL" vibe you get.
I hope I'm making any sense.
thanks