I wouldn't try that.

2 seconds sound clip from the The Greatest (1977) movie soundboard.

You can hear this line at 00:50:03.750 in the Blu-ray version of the movie.

Quote context

[...]

- Mr. Muhammad said, not enough money.

- All right, so we agreed already. We'll make him a final offer. 75.

- If you're going to give me that much money for my fighter to take twenty percent, you really ought to give him forty.

- You're crazy.

- No way. That can't happen.

- Better than that is to cut out all of your middlemen, start our own ancillary. company, and give him fifty percent.

- I wouldn't try that.

- You don't know it, gentlemen, but almost every black fighter in the history of boxing ended up broke. That is not going to happen to Muhammad Ali.

- Maybe you don't know the reputation I got, Mr. Muhammad. As a prophet. So many times I said something terrible is going to happen to a particular fellow. And what do you think happens? He comes to grief.

- That's very interesting, Mr. Curtis.

- Because I'm a bit of a psychic myself. And I'm predicting that if any grief comes to anyone I know, there's going to be twice as much of the same to whoever caused it.

[...]