Beavis: [singing along] Now whip it!/Into shape!/Shape it up!/Get it straight!/Go forward!/Move ahead!/Try to detect it!/It's not too late!/[starts going out of time with the song]To whip it!/Into shape!/Shape it, uh...[realizes he is singing out of time]...go forward...move ahead, try to detect it...
Butt-head: That sucked, Beavis.
Beavis: Well, at least I tried. You just sit there on your ass and make me do all the work.
Butt-head: That sucked, Beavis.
Beavis: Well, at least I tried. You just sit there on your ass and make me do all the work.
Beavis : [singing along] Now whip it!/Into shape!/Shape it up!/Get it straight!/Go forward!/Move ahead!/Try to detect it!/It's not too late!/ [starts going out of time with the song] To whip it!/Into shape!/Shape it, uh... [realizes he is singing out of time] ...go forward...move ahead, try to detect it...
Butt-head : That sucked, Beavis.
Beavis : Well, at least I tried. You just sit there on your ass and make me do all the work.
http://www.tv-quotes.com/shows/beavis-and-butt-head/quote_36356.html