Well, except that 'launched himself' or 'lunged' implies that he's doig it, which he isn't -- he poped the lock on the door, and now he's being launched out of the portal.

As for piecring eyes... sharp. A gaze that could pin you to the wall, or cut you to your soul. I'm sure you've seen the sort. They aren't the soft or warm eyes that some have, but hard and cold. Those eyes. Not that he's a mean guy, mind you... perhapse 'intense' is a better word.