I drove under the overpass.
That would be an underpass.
Yesterday, I drove over
The underpass.
That is the overpass,
Above the underpass.

In squash, 99% of the ball
Is In-bounds on the red line,
But still 100% out-of-bounds.

In tennis, the ball
Is 99% out-of-bounds,
On the white line,
But still 100% In-bounds.

And, if I stand on my head long enough,
Our world seems up-side-down,
But really, it's right-side-up.

Life is like that.
Isn't it confusing?