
There's a MOTION on the floor,
"I'm ridiculous."
The Big Bang Theory Season 9, Episode 21

I was calculating
the random MOTION
The Big Bang Theory Season 5, Episode 23

...and force was not necessary
to maintain MOTION.
The Big Bang Theory Season 3, Episode 10

- Or there are MOTION sensors involved.
- No, I meant...
The Big Bang Theory Season 1, Episode 4

How about the Perpetual Motion Squad?
The Big Bang Theory Season 1, Episode 13