I know a few of them, but the only one I will comment on is the Richard Pryor one because that is one of the funniest comedy routines I have ever seen.

"I use to box in the golden gloves"
"I was good in the gym, in the ring is where I had my problems!"
"because the bag don't move!"
"I would get in the ring niggas be talkin bout "
"I said coach what do I do about this shit here!"