You couldn't break the skin with that.
3 seconds sound clip from the Vacation (1983) movie soundboard.
You can hear this line at 01:29:35 in the DVD version of the movie.
Quote context
[...]
- Isn't this fun, honey? Come on.
- That's not a real gun, is it, Clark?
- What? Are you kidding? This is a Magnum P.I.
- Don't try me. I could put an eye out with this thing.
- You couldn't break the skin with that.
- It could. It could break the skin. It could lodge under the skin and cause a bad infection.
- That's an old wives' tale, Clark. I'm telling.
- Ooh!
[...]