You have 30 minutes to move your cube

[Homer has taken over as Mr Burns' assistant. He is reading Mr Burns' phone messages aloud.]

Homer: Here are your messages:
"You have 30 minutes to move your car",
"You have 10 minutes to move your car",
"Your car has been impounded",
"Your car has been crushed into a cube",
"You have 30 minutes to move your cube".
[phone rings]
Homer: [answers] Yello, Mr. Burns' office.
Burns: Is it about my cube?

— The Simpsons, 'Homer the Smithers', 3F14