Quote from Kelso in Magic Bus
Eric: Yeah, okay, fine, but she should have done something for me. Hyde: Well, we're here for you. We scraped together a few bucks and got you something you can actually use. Eric: What is it? Hyde: It's a knob for your new stereo. Eric: Wait, did you guys just take this off while I wasn't looking? Fez: Eric, there's an old saying. "Don't look a gift horse in the knob." Eric: And what happened to my Led Zeppelin eight-track? Kelso: You mean gift number two.