Satriani's pinched harmonics

[FormatoA3]

little introduction:
Hi i'm formatoA3 from Italy my favuorites bands are death, at the gates, and Dark tranquillity im just playing the guitar from 9 months (an Ibanez rg)
ok is enought.. ah trey Azaghtoth(morbid angel :vampire: ) , chuck shuldiner(rip) :bawling: , joe Satriani are my favourites guitarrists.. kk

so I know how to make tap, pinched or artificial, natural harmonics
but always I see Satriani videos he crosses his arms and uses whammy bar for alter the pitch of the harmonic somebody know how can remake the same effect??

please answer to me

[amerok]

he does an AH on an open string then for some reason uses his left hand to do the whammy bar.

[FormatoA3]

he uses the same technique an satch boogie? (I was thinking he makes an NA on the pick-up and uses the whammy)

[metalpro]

he does a pinch harmonic on an open string which is why he uses his left hand to use the whammy, i know because i watched him do it, and in his interviews he said thats what he does.

[Soeru]

I've seen in one of his tutorials that sometimes he does very squeeky pinch harm's by slanting the pic even downwards a lot.