"? It's possible for the subjects to be different, as in "He's stuffing down the cake as if someone's about to ****** it away", but your first sentence (amended as above) doesn't seem right (the required logical connection between the two parts does not exist) The last sentence (with "like") would be the usual way to say it.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.