i know 2 more
the first one is done simply with the whammy bar - this offers you the possibility to vibrato up and down, while with a normal vibrato you can only vary the tone upwards.
the second one is something that george lynch and warren dimartini use quite often - its more like a slide - play a note say the e on the g-string 9th fret - then slide back and forth between the 8th, 9th and 10th fret very quickly - this is nothing for the soft ballads however :D
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