Mr. Cowell and Mr. Morgan both were mugging for the camera as the introduction was taking place, making obvious their amusement at what was certain to be a comical performance.

I agree that the crowd reactions were a bit harder to gauge and could have been amusement at either the contestant or the judges' obvious reactions.

"The white men were as thick and numerous and aimless as grasshoppers, moving always in a hurry but never seeming to get to whatever place it was they were going to." Dee Brown