Mythbusters and explosive decompression

Hi all,
I don't know if it was a rerun and has been thoroughly done over here,
but last nights episode of The Mythbusters 'busted' the explosive
decompression myth surrounding bullet holes in aircraft.
The guys sealed up a junked out cabin, pressurized it, then fired 9mm
bullets through first the skin and then a window. Nothing exciting happened.
Pretty interesting stuff.
They ended the episode by blowing a large hole in the fuselage. I was
out of the room when they set the charge so I don't know the size, shape,
etc. I did a bang up job of opening a hole.
My conviction of the miniscule damage to be caused by a sky marshall or
pilot popping off a few caps at a terrorists has been reinforced. The
diameter difference between a 9mm (.38") and a .44 Mag wouldn't make any
difference. Let's give the good guys the bigger cannon.