Quote from Woody in Head Over Hill
Woody: [answers phone] Cheers. Uh, hang on a second, I'll check. Yeah, the refrigerator's running. Thank you for asking. What? [chuckles] How could it possibly get away? No, a refrigerator doesn't have the power of movement. Well, yeah, sure, I get it, but see, running - the way you're using it - c-can only mean working. See, it's a... It's what we call a homonym. I'm sorry, too. [hangs up] Boy, Mr. Peterson, some people. [whistles] [meanwhile at the payphone:] Frasier: [to Lilith] Well, you tried to explain the joke. That's the problem.