Well, in music I suddenly found out. That 4/4 was not a tempo, that is. It's a time signature (I hope).
By psychological, I mean that I am sure that it is not the clock that speeds up, but it is something I perceive. Good grief, with all these questions I recently asked here, I may be going insane!
And no, I don't play Final Fantasy. It looks enticing, though.
Let me describe it: I lie awake, and the clock seems to be going fast, with seconds going as 1,2,3,4,5, as opposed to 1...2...3...4...5..., the latter being normal speed. I go to the bathroom (or anywhere else I may go), and as I return to my room, the clock paces again at 'normal speed'. My little brother's breathing above me is normal to my ears, and the clock doubles the velocity it would normally be ticking at when I experience, 'time compression'. As I can snap out of it on demand, I think this enigma is psychological.