(descaradamente) roubado ao Gato Fedorento:

The Dr. Stephen Hawking Action Figure stands approximately 5 1/2-inches-tall and comes with a mug of beer and a flying wheelchair. Place Dr. Hawking on any compatible Springfield Environment to hear him talk! Recommended for ages 4 and up.

Stephen Hawking in The Simpsons:

Skinner: I'm sure what Dr. Hawking means is --

Hawking: Silence. I don't need anyone to talk for me. Except this voice box.

(…)

Lisa meekly asks the crowd to stay calm, but a full-scale Springfieldian riot quickly develops. Hawking figures it's time to make his escape and activates ... his automatic toothbrush. Oops -- wrong button.

(…)

Hawking: Your theory of a donut-shaped universe is intriguing, Homer. I may have to steal it.

Homer: Wow, I can't believe someone I never heard of is hanging out with a guy like me.

Moe: All right, it's closing time. Who's paying the tab?

Homer: [imitating Hawking's voice box] I am.

Hawking: I didn't say that.

Homer: [still imitating] Yes I did.

[a glove comes out of Hawking's wheelchair, bopping Homer in the face]

[still imitating] D'oh.

Os Gatos rant about disability, insofar as humour is key to lessen excess dramatisation of it, so here's an excerpt equally «borrowed» from them from Seinfeld:

George: Must be one of those rich, spoiled handicapped people, who didn't want to do any work, and just wanted to sit in her wheelchair and take it easy.

(…)

Salesman: This is out best model. The Cougar 9000. It's the Rolls Royce of wheelchairs. This is like... you're almost glad to be handicapped.

Kramer: So now, what's this got?

Salesman: Inductive joystick, dynamic braking, flip-up arms, it's fully loaded. I put Stephen Hawking in one of these two months ago, he's lovin' it! It's rated number one by Hospital Supply and Prosthetic Magazine.