Commercial jet-airplanes

Commercial jet-airplanes are powered by giant turbofan engines.
Those turbofan engines produce a particular noise-spectrum which,
in its low-frequency and infrasound-frequency bands,
has the effect of disrupting truth-perceiving focus in the people who hear it.
It thus parallels voice-sliming in that respect.

In addition to the noise aspect of commercial jet-airplanes,
there is also the insanity aspect:
Jet-airplane riders put themselves precariously miles abuv the planet's surface,
and think nothing of it.
That is even more insane than thinking that the whole universe was
co-created by an egomaniac from Galilee.
It is probably the single most insane aspect of modern humans.