It's the audio, I think.

Did he even try it out on an actual dog?

This was tested on many dogs. There were many... accidents as the Perfect Pet Petter was refined. This is how progress is defined.

THEY LAUGHED AT EDISON TOO

If it freaks the hell out of the humans what kind of response do you think you'll get from the dog

Like American Idol, the losers in the first few episodes are the best part of the show.

"You've invented...a hand."

Now all he needs is autistic pets.

When I saw the preview image and I read that it was a "freak-out machine for a dog", I got a very different impression of what its purpose was.

WHOSAGOODBOYCMERECMERESMOOCHSMOOCHSMOOCHILOVEYOUILOVEYOU

Once this thing pets a pet, it STAYS petted.

set it and forget it?

settings include pat, rub and SMASH!!!

I think I saw this on America's Funniest Home Videos or something 100 years ago!

Yeah, the CRAZY BANK. Jesus I could never hate a dog enough to do that to it.

The echo when he turned it off made me laugh for some reason.

He thought he had seen it all-- this must have been before the Bladder Buddy.

He has some other hands he is working on in his shed... but they are of a more personal nature.

He will be a millionaire. Pet fanatics are just stupid enough to pay out the ass for things like this. That man is just brilliant enough to cash in on this fact.

So a dog, left all alone, is supposed to walk up to this dalek and just stand there? No way in hell, but IŽd definitely buy one. That would be the perfect house-warming gift for a friend with no pets.

What Dr. Who set did he pluck this monstrosity from?