I shook Mike awake.
"Wake up! I have to tell you this joke so I don't forget it! It's really good!"
"Mummblemmmblemurrrrrr."
"Okay, get ready. It's really good..."
"mblemurr..."
"What did Mickey Mouse do when Annette Funicello died?"
"..."
"He shed a Mouseke-tear!"
(Well, it's better when told verbally, because then it works on two levels: Mouseke...teer...tear.)