Another Fallon clip - Lost Parody preview, looks funny, at least if you're a Lost fan...

Pants on the ground - the original

(If this link disappears, just search the Internet, it's everywhere by now!)

And the Jimmy Fallon/Roots/Randy Jackson version

Here's a video that's going around.

There's a part near the end that makes me a little queasy, just to warn ya!

I have no idea if this is real or not, trying to find out, but it's amazing if it is...

Crazy.

Conan's take on some of the twitter nonsense.

Bonus video - Jimmy Fallon and Will Ferrell do a makeover. Nothing to do with Twitter, except that @jimmyfallon posted the link on Twitter. He uses it well, Conan just mocks it.