I'd do it with just the exclamation point since the question is rhetorical and not meant to be answered. It's more like an interjection. That is, you say it with excitement (or emotion) rather than as a query.

That's certainly true in that case. Sort of a bad example since the question is rhetorical. Maybe I should have gone with "Is it the blue wire or the red wire!"

Temperatures near absolute zero have been achieved with the techniques of laser cooling and magnetic evaporative cooling. In laser cooling, fast-moving atoms are jostled with photons until they slow down to 1/10,000th of a degree Kelvin.

You know, I come here to get AWAY from my job for a few minutes. Sheesh.

My theory: an alien implant.

Have you had any "lost time" recently?

I don't remember.

Maybe I should have gone with "Is it the blue wire or the red wire!"

Hm. I guess I would go with Barb's tag suggestion. Put the question mark in the quotation and the exclamation in the tag.

(Also, it's the red wire. Duh.)

(Also, it's the red wire. Duh.)

No! The blue one!

A Very Naughty Bear

Winnie the Pooh gone horribly wrong. On a t-shirt.

This is why you two should never defuse bombs together.

This is why you two should never defuse bombs together.

Duly noted.

But what about the green wire?

Wait, are we talking about which wire to cut or which wire to NOT cut?

Speaking of which, check out this cool alarm clock:

Alarm Clock Defuses a 'Bomb' Every Morning to Wake You Up

We've seen a lot of novel ways to wake up those of us reluctant to get out of bed in the morning. We've seen alarm clocks that annoy, soothe, and embarrass you to get moving, but we haven't seen anything that could induce the level of panic that would accompany having to defuse a bomb every morning.

The DangerBomb Alarm Clock startles you from your slumber with loud explosion sounds and forces you to "cut" (actually pull apart) a different colored wire every morning to "defuse" the bomb before it will stop going off.