Scientologists likey-likey them pinch tests because if lends credence to the voodoo rituals that they pay big bucks for.
Imagine paying a scientific witch doctor $100,000 for a magic lantern (to realize your wishes....I mean postulates) or a voodoo doll that you can use to push pins into to shatter your enemies. In a Scientologist's case (literally and figuratively) that would be "annihilating" the Reactive Mind, BT's, SP's, Barriers to Richness, Impediments to Freedom, et al.....
If the witch doctor could only give ya a little demonstration of how the voodoo doll works with a "Pin Test" it would sure make ya feel all FNey and Winning when you sign that $100K check over.
OW (Operating Witchdoctor)
Recall something that is ruining your life.
SCIENTOLOGIST
Okay, it's my SP father who hates Scientology.
OW
I get that! Okay, now put the pin in and
shatter that psych-loving cocksucker.
SCIENTOLOGIST
(puts pin into brain)
Wow, I feel all FNey and VGIS knowing he is going
to drop his body and won't be able to natter any more
about Ron or taking away my million dollar trust fund.
OW
(removing pin hastily)
Hey, knock off the evil purposes and out ethics! Ron says you should
never antagonize an upstat who can flow power to your Bridge.