Big Bang Theory Quote
(returning home, Sheldon starts up the stairs)
Penny: Hang on.
(pressing the elevator call button)
Penny: What do you think? Want to give it a try?
(as the door opens, he looks in uncertainly, then glances at the stairwell)
Sheldon: Well, you know, the elevator did work when I moved into the building. So going up and down the stairs was a change, which means this would actually be a return to the status quo. But conversely, I think...
Penny: (shoving him) Get in!
Sheldon: (the doors close) This is wild.
Quote from S12E23 - The Change Constant