From Tate Modern video: executive producer: Jane Burton. Full video here.
“He (Roy Lichtenstein) used to joke and say someone is gonna be tapping him, ‘Mr. Lichtenstein, it’s time for your pill’. He’d be in a wheel chair with his hat cocked on his head, and he would still be living in Oswego, N.Y., snowed in, and this would all have been a dream.”