In physics class one day,

You'd come and sweep me away.

"Space and time

Are all just fine,

But light's the real deal," you'd say.

I still have never quite gotten

(In fact, by now I've forgotten)

Why spacetime changes

As light rearranges,

And everyone else says you're rotten.

I did find it slightly confusing,

And perhaps a little amusing,

That trains going fast

Can go right on past

A closed door and just keep on cruising.

Still, you are cause for festivity,

Since you lack a certain simplicity,

You confuse everyone,

But man, are you fun,

Bewildering, weird relativity!