Why did you build a death ray?

To take over the world.

No, I mean, what mad hypothesis are you testing? Are you just making mad observations?

Look, I’m just trying to take over the world. That’s all.

You’re at least going to leave some of the world as a mad control group, right?

Sad fact: most “mad scientists” are actually mad engineers.

(Borrowed from a Cowbirds in Love strip which at the time of this writing is inaccessible.)