Falsifiability

I found this little anecdote in the book Plato and a Platypus Walk Into a Bar, and couldn't help but share:

Two men are making breakfast. As one is buttering the toast, he says, "Did you ever notice that if you drop a piece of toast, it always lands butter side down?"

The second guy says, "No, I bet it just seems that way because it's so unpleasant to clean up the mess when it lands butter side down. I bet it lands butter side up just as often."

The first guy says, "Oh, yeah? Watch this." He drops the toast to the floor, where it lands butter side up.

The second guy says, "See, I told you."

The first guys says, "Oh, I see what happened. I buttered the wrong side!"