Half empty, half full?

Pradeep took a sip of his whisky, and with a thoughtful look on his face, he said:

“John, do you think life, you know, in general – is a half full, or a half empty glass?”

I threw down my drink, looked at him, and said:

PUMP UP THE JAM, PUMP IT UP WHILE YOUR FEET ARE STOMPIN’” ?

Then Pradeep laughed and said: ”Hey, SIRI, play «No Limit»” ?