It's not every day that the Earth stands still. It's not every day, either, when the fate of the entire planet depends on you - specifically, on your ability to remember exactly what phrase will stop that world-destroying robot from, well, destroying the world.

'Cause that's what world-destroying robots do, right?

So at that crucial moment (and I'll be the first to admit that it almost never happens), we'd all be grateful if you'd just wear this Klaatu Barada Nikto t-shirt.

So you won't forget.

Is that so much to ask?