[Having been given money by Red to buy a jersey, Eric comes back to the stands wearing a Chicago Bears jersey, amidst a sea of Packers fans]
Red: Eric, how the hell can you wear a Bears jersey at a Packer game?
Donna: Okay, maybe he doesn't understand why it's wrong. Let me tell you in a way how you can understand. The Packers are like the Jedi, and you're wearing a Go Darth Vader jersey.
Eric: Uh, that's ridiculous. The Jedi don't play football. They play manu-Ka.
Hyde: Forman, this is worse than when you wore the Air Supply t-shirt to the Aerosmith concert.
Red: For God sakes, will you just take the damn jersey off?
Eric: No. You know what? I like rooting for the underdog, okay? I am the underdog in real life. I like Charlie Brown. I like the little engine that could. I like the Bears.
  
  Red: Eric, how the hell can you wear a Bears jersey at a Packer game?
Donna: Okay, maybe he doesn't understand why it's wrong. Let me tell you in a way how you can understand. The Packers are like the Jedi, and you're wearing a Go Darth Vader jersey.
Eric: Uh, that's ridiculous. The Jedi don't play football. They play manu-Ka.
Hyde: Forman, this is worse than when you wore the Air Supply t-shirt to the Aerosmith concert.
Red: For God sakes, will you just take the damn jersey off?
Eric: No. You know what? I like rooting for the underdog, okay? I am the underdog in real life. I like Charlie Brown. I like the little engine that could. I like the Bears.
 [Having been given money by Red to buy a jersey, Eric comes back to the stands wearing a Chicago Bears jersey, amidst a sea of Packers fans]  
 Red : Eric, how the hell can you wear a Bears jersey at a Packer game? 
 Donna : Okay, maybe he doesn't understand why it's wrong. Let me tell you in a way how you can understand. The Packers are like the Jedi, and you're wearing a Go Darth Vader jersey. 
 Eric : Uh, that's ridiculous. The Jedi don't play football. They play manu-Ka. 
 Hyde : Forman, this is worse than when you wore the Air Supply t-shirt to the Aerosmith concert. 
 Red : For God sakes, will you just take the damn jersey off? 
 Eric : No. You know what? I like rooting for the underdog, okay? I am the underdog in real life. I like Charlie Brown. I like the little engine that could. I like the Bears. 
  http://www.tv-quotes.com/shows/that-70s-show/quote_33606.html
  

