That ain't true.
3 seconds sound clip from the The Sandlot (1993) movie soundboard.
You can hear this line at 00:32:00 in the Blu-ray version of the movie.
Quote context
[...]
- Forever. Forever. Forever. Forever. Forever.
- See, man? That's why you can't go over there. Nobody ever has. Nobody ever will.
- One kid did, but nobody ever seen him again.
- Nuh-uh. No. None of that's true. You guys are just making this up to scare me.
- Oh, yeah? Stick your head out that window and look down.
[...]