It's quite interesting that when he simply jumped and punched that Vulcan behemoth, he himself wasn't affected at all, only Vulcan was sent flying fast and far. That is, Newton's third law of motion was ignored. However, later he avoided the club swing by realising that his telekinesis can't move a thing as large as Vulcan significantly, but the opposite force (what he called recoil) is enough to affect his own body, pushing him out of the danger zone. That is, the third law was in effect. Quite convenient indeed!
Edit: More importantly, Hunter Park Hee-Jin is really beautiful. The MC should get closer to her, assuming she's still single. She should possess quite a positive attitude toward the MC, considering she's alive thanks to him. Unless she's afraid of him.