Similar experience here.
There was a stubborn sliding door in the lunch room where I used to work. Well, I was asked to close it one cold day, and found myself overextended, a nice 45 degree angle, trying to muscle the thing across its' track. I stopped, stood upright like a normal human being, and like you, pushed from my center, and closed the door without any further drama.
Feeling smug about remembering what I was taught about keeping my "one point", I proceeded to humble myself by tripping over a chair leg on my way back to the table.