What makes you think they're going to believe it?
3 seconds sound clip from the Rocky Fortune - Double Indemnity (Ep. 2) classic radio drama series episode.
You can hear this line at 00:20:44 in the radio play.
Quote context
[...]
- Just step over to the edge of the cliff if you please.
- You take on weight all of a sudden.
- Okay.
- Mind if I ask what happens next, or am I being naive?
- Next, Mr. Fortune, you accidentally fall off the cliff. The car follows you.
- Exactly.
- What makes you think they're going to believe it?
- You're suicidal. Even Judge Harley saw you go through a window.
- Turn around. We haven't much time.
- Laura, push him over. Come on, this is no time to lose your nerve. Push him!
[...]