explanation point bash

[COKEDUDE]

What is the deal with explanation point in bash? I thought only dollar sign ($), the back-tick (`) and the backslash (\) were special in double quotes. Can someone please explain what is going on here? Why do I have to use single quotes or backslash the "!"?

$ vlc "/media/Part 1/stuff/bucks!395201.flv"
bash: !395201: event not found

[sonoran]

! is the history expansion introducer:
http://www.gnu.org/software/bash/man...ry-Interaction

only \ and ' can escape it.