I just looked at a video on youtube of a guy who had adjusted his pickup height on his strat andthe bridge pickup was almost to the strings.. and it sounded distortiony ona clean amp.. Well... is it a good idea to raise my humbucker pickup on my les paul clone to get more... Metal! out of it?
Has quite the oposite effect really, the magnetic pull from the pikcups usually results in less sustain and the sound gets a bit muffled.

What video is this? Are you sure it wasnt just a cranked valve amp?