Cool guitar tricks

hey anyone have any cool tricks for the guitar?
something fun and different that will help me gets some cool sounds/effects out of my guitar..
an example of what i mean is like if you put pressure on the bridge and then release on and off...it gives a whammy type sound..
any of yall got some cool tips/tricks?

Yeah Here's one I used to see Mike Scaccia of Rigor Mortis than he later Joined Ministry do.
He's was my favorite guitarist in Dallas back in the late 80's this was when Pantera was still glam..He does this trick on like "Reanimator".Awesome guitarist but crappy band!
But they were too evil made me quit metal altogether and start going to church lol..

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