[After the boys fail a field soberioty test]
Officer: I'm going to have to take you boys downtown [picks up non-alchoholic beer] and I'm going to have to take this with us.
Butt-Head: Yeah, you can't forget the beer.
Officer: [Reads on back of beer "Contains No Alcohol" and reads it aloud] You guys aren't drunk, you're just stupid.
Season 7
Officer: I'm going to have to take you boys downtown [picks up non-alchoholic beer] and I'm going to have to take this with us.
Butt-Head: Yeah, you can't forget the beer.
Officer: [Reads on back of beer "Contains No Alcohol" and reads it aloud] You guys aren't drunk, you're just stupid.
Season 7
[After the boys fail a field soberioty test]
Officer : I'm going to have to take you boys downtown [picks up non-alchoholic beer] and I'm going to have to take this with us.
Butt-Head : Yeah, you can't forget the beer.
Officer : [Reads on back of beer "Contains No Alcohol" and reads it aloud] You guys aren't drunk, you're just stupid.
Season 7
http://www.tv-quotes.com/shows/beavis-and-butt-head/quote_36061.html