Person 1: I could jump across that
river.
Person 2: No you couldn't. You would fall in and drown.
Person 1: Nah, I could make it.
Person 2: There is like a .00000001%
chance that you could make that jump. That's
pretty freakin' impobable dude.
Person 1: But not impossible *tries to jump across river, but promptly falls in*