The probability on one machine is a million and a half to one. On three machines in a row, it's in the billions.
6 seconds sound clip from the Casino (1995) movie soundboard.
You can hear this line at 01:09:44 in the Blu-ray version of the movie.
Quote context
[...]
- You didn't see the scam? You didn't see what was goin' on?
- There's no way to determine that. Yes, there is. An infallible way, they won!
- It's a casino. People gotta win sometimes.
- Hey. Ward, you're pissing me off. Now you're insulting my intelligence.
- You think I'm a fucking idiot?
- You know goddamn well somebody had to get into those machines and set those fuckin' reels.
- It cannot happen. Would not happen!
- You fucking momo! What's the matter with you?
- Didn't you see you were being set up on the second win?
- I really think you're overreacting.
[...]