Flick of the switch was pretty nice, i've done it before. I think that Randy Rhoads did it sometime too.

instead of using the index pinky whilst tremelo picking harmonics, i just lightly rest the side of my palm on the string, and keep it steady enough while picking it

try this one, take your fretting hand and hammer/pull on the 4th, 2nd and open, then lightly drag your palm of you picking hand up the neck, it should sound like alot of harmonics and a slid technique at the same time

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I've had buddies speaking to me on the phone and I would put the phone up to my pickups and turn up the volume on my amp. They could here themselves!!!

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take a round surface like a battery or ur whammy bar and lighty tapp it on ur strings while their muted to sort of give a sound like a cartoon. dont forget sliding the round surface. try with delay. and always on clean

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Rhandy does it on the live Tribute album during his stand alone guitar solo, Kirk Hammett used it on the To Live Is To Die solo and various punk bands used it at the end of songs to give that morse code feedback effect.

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squeal then slide into another squeal. Pretty neat. Simple, but sounds cool

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Turn your Pick sideways and make a slicing motion with it across your strings while muting them with your left hand. Makes an awesomely High pitched slice sound.

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Take your whammy bar out, turn up the delay, chorus and gain, (on distortion of course) and have it set on your bridge pickup (or w/e picks up harmonics best on your guitar) and then lightly slide your whammy bar across the strings. High e works the best. Its really fun and cool sounding.

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On the "thing that should not be" ending,

Doesn't kirk stroke the strings with his hand up and down over the pickups?

It's the muffled sounding stuff. What's that called?

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to the guy bout upstroke pinhed harmonics, its on the 1st page somewhere.

i sayd that u could use ur index finger while picking.
but u can also use ur thumb for upstroke pinch harmonics, juts plece ur thumb all the weay over the string, and pick, u can trempick they thatway aswell.

i just noticed this 10 mins ago, works pretty good

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Play a 3 note tapping riff on the bottom e string and when you tapp with your pick hand, bend the string around the neck to add a fourth note to it. it sounds crazy if its done right.

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I just came up with a new floyd rose trick!!! push the wammy all the way down and pluck the top E string open with your pick. then right after you pluck the note, pull up on the wammy as hard as you can and vibrate it a little...... if done right, it sounds exactly like a chainsaw reving!!!! make sure you use a bit of chorus and alot of distortion.

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Van Halen and a bunch of other people already use this trick. Listen to Wildside by Motley Crue, same technique.

It's not actually sweeping with his tongue, it's a carefully planned trick with his delay, that plays the sweeping again while he's pretending to sweep with his tongue. Still pretty cool though.

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hold one note and tap the note on the oposite end the same number of frets from the 12 as from the nut on your fretting hand, you get that note, as a harmonic

ex: hold 3, tap 15
hold 1, tap 13
hold 5, tap 17
etc..

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Delay??It looked like a sampler to me?

that's the one - forgot the name for it!

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play your guitar with a drumstick.

Siriously it kicks ass better try to not hit the guitar very much though as it might cause a few dings It sounds cool thoug and you can slide the drumstick up and down and push the strings with it and get all kinds of cool crazy sounds!

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Or Use the mic stand as a slide,with some delay/whammy ect.