From the documentary, "I Know That Voice." Bob Bergen, voice actor for "Looney Toons." Mel Blanc was, without question, a genius. But this guy, the way he has analyzed it and effectively replicated it is a genius in his own right. Amazing.
Bill takes apart a coffee maker to show how hot water is pumped through it using a "bubble pump." The use of this pump reflects an engineer's choice to have only one heating element to lower the cost.