"He was a mess when he came in. I learned a lot about show business and life and false dreams and hopes that week. They had Chris Rock on hold and they had a 24-hour nurse and here's this guy who could die at any second, and it was just like, 'Well the show must go on' rather than just acknowledge that this guy could be dead at any second and he obviously has a major problem.
"He came into my office saying, 'I know you've got weed,' and he went through my drawers and grabbed my stuff and then he grabbed Tracy [Morgan's]. Then, later, he was sweating and jittery, I was looking at him and thinking, 'Pot don't make you do that.'
"That week, he just kept calling me. It messed with my head, like, 'Why is he calling me?' Saying, 'Am I funny? Or am I just fat and stupid? Am I funny or am I just an a**hole?'
"It was tragic because he was one of the best performers I've ever seen go on there. the light went on, he could crush anybody. He was the ultimate performer."
On his feelings about "Saturday Night Live" now:
"I don't have any emotional attachment to it, never did, it was just a place where I was at the time. I knew when I was there I didn't have to be on every episode but when I was on, I had to just knock it out of the ballpark. People only remember the great sketches that you do, they don't remember the 400 that sucked. People say 'You were an amazing Goat Boy, you were an amazing Pesci.' But there were 40 of them that sucked.
"But I never watch it. Once I left the show, I just had no desire. I can't even look at it the right way, I always see the whole machine that goes behind it. I'll watch a sketch and go, 'Now I know they didn't want to write that. I know exactly who wrote that. That guy didn't want to do that.'"