There are many sad things, 
Like a child drowning in a vat of molasses, 
(How would a child end up in a vat of molasses?...)
Or if you were to lose the phone number of someone you find intriguing, 
(I'm sure it's in the laundry...)
Or a phone that keeps ringing and ringing and ringing and no one will
Answer, 
(?...)
Sad like a zero on the LED display of your answering machine, 
(Saaad... That's a very melancholy numeral.)
Sad like a photograph of your grandfather at the age of twenty-seven, 
But I believe, and I believe strongly, 
(He's trying to make a point here...)
There is nothing sadder than
A frog plucking a banjo.
(Frooogg...)
That's about as sad as you can be, 
A frog plucking a banjo.
Let us contemplate the sadness, 
(?...)
Of a banjo playing frog, 
Let us examine the sadness, 
It's extremely sad, 
(When the banjo is plucked by the frog...)
Frog playing a banjo.
(Frog plucking a banjo...)
Is the frog aware that he is sad?
(I believe that he is aware...)
Well, I'm not so sure you're correct about that.
(Why is that?)
I really--don't--think a frog that plays a banjo is quite so self-aware.
(I beliiieeevvee...)
Is there anything quite so sad?
(A froooggg playing a banjo...)