im just wondering how this is done and if it's the sound in most ozzy songs.

also do you need a metal amp for it?
I find if you do a muted bend(don't play the bend)and then do the vibrato with your index, you get a wider sound. That's how i was taught anyway and it works great for me.
Quote by Dirtydeeds468
People don't like Dave Mustaine because he created something that owned Metallica in just about every single aspect of thrash metal.

it's true
I've always just done it the same as normal vibrato. Just...wider.
Art is making something out of nothing and selling it - Frank Zappa