Whatever you do don't just leave it. Get a jack and blocks and support the engine asap.
You'll need a new mount and fixings. Though I'd be more worried that something else has been shagged because it was driven.
I'd check the driveshafts, belts, hoses and the other mounts at least. I'm also really surprised you didn't lose the servo assist when the engine dropped.
How long ago was the belt changed?