Screw the end cap on. Very gently.
7 seconds sound clip from the The Terminator movie soundboard.
You can hear this line at 01:17:58 in the Blu-ray version of the movie.
Quote context
[...]
- What have we got? Mothballs. Corn syrup. Ammonia. What's for dinner?
- Mmm, that sounds good. What is it?
- Nitroglycerin, basically. It's a bit more stable. I learned to make it when I was a kid.
- Make sure there's none on the threads. Like this.
- Screw the end cap on. Very gently.
- You must've had a fun childhood.
- All right. Six more like that, and I'll get started on the fuses.
- It'll never be over, will it?
[...]