An old friend returns.

[Meta_Fish]

And I couldn't be happier. There are a lot of videos like this.  

[alsoknownasak]

it's a meme  

[Al Torrenz]

Those are so awesome. I can't find the one with the handicapped guy falling down the rolling stair...  

[Super Cheesio]

Uh... I don't get the bit with the crazy parent, and I don't see how it ties in with good old keyboard cat.
EDIT: Okay, I've seen more videos like this and I lol'd at them.  

[nerdyninja]

this was awesome, the keyboard cat was entirely optional