A Sound Diagnosis
A six year old boy goes to the hospital with his grandmother to visit his Grandpa.
When they get to the hospital, he runs ahead of her Grandma and bursts into her Grandpa's room.
"Grandpa, Grandpa," he says excitedly, "As soon as Grandma comes into the room, make a noise like a frog!"
"Why do you want me to make a noise like a frog?" Grandpa replied.
"Because Grandma said that as soon as you croak, we're all going to Disneyland."