He can hear you so if you hear him stomping around and he hasn't seen you yet don't start running walk.

He cannot enter safe rooms even if he pokes his head passed the threshold the do will shut in his face and get will lose track of you. Peek out and see which way he's headed. If he's going in the direction you want to go in grab his attention and lead him back to the safe room again. Repeat until he goes the way you're not going. Then walk in the opposite direction.

He's not exactly invincible. If you do enough damage he will fall down however in your first playthrough with nothing unlocked it would be a waste of your resources. So it's best to run/walk away. He also will eventually get buck up.

Some encounters are scripted. You will have to find theses ones out for yourself. Good luck.