YouTube opened up its headquarters in San Bruno to some reporters this morning to announce the site's biggest redesign ever.

We also got our first glimpse of the YouTube slide.

The team expanded to the top floor of its building this summer -- it was previously occupied by The Gap -- and this being Google, they immediately added a three-lane plastic slide.

It's big. Fast. A little bit scary.

Here's a video of the inaugural run from the opening this summer.

And here's the slide at Google HQ in San Francisco: