Just get some iPod earphones, have them not connected to anything, but visibly dangling, so when he tries to talk, just motion like "I can't hear you", then say loudy "Oh, God, I LOVE THIS SONG!!!"

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.