They don't do it like that anymore. Now they got this big air gun that shoots a bolt into their skull, then retracts it.
8 seconds sound clip from the The Texas Chain Saw Massacre movie soundboard.
You can hear this line at 00:08:38 in the Blu-ray version of the movie.
Quote context
[...]
- It usually wouldn't kill 'em on the first lick.
- That's horrible. People shouldn't kill animals for food.
- It's just boom! It goes boom! And boom!
- I like meat. Please change the subject.
- That's terrible. It's still going on.
[...]