Malcolm in the Middle, Season 3

TV:
"...to break free of the atmosphere, a rocket must attain speeds of 25,000 miles per hour."

Reese:
Bull! If they went that fast they'd be squashed in the back of their seats! They wouldn't float around!

Malcolm:
You're confusing acceleration with velocity. You feel it at first, but once you're up to speed, you don't notice. Right now we're on a planet spinning at 1,000 miles per hour. We're also travelling around the sun at almost 67,000 miles per hour. The solar system is hurtling through the galaxy which is hurtling away from other galaxies cos the universe is expanding.

[Reese nervously clutches the arm of the sofa.]

Dewey:
Wheeeeee!