Today I saw a bumper sticker that said "Cowgirl up!" and I thought how strange it is that we use the word up as an adverb, or sometimes as part of a verb. I wonder if there's any significance to that.
There are probably a million more examples, but those are the first ones that came to mind.
I've noticed that when I tilt my head back and look up at the sky and try to walk in a straight line I can't do it. I just fall over.