on the "hang man hang" part play harmonics on the A string staring around the 9th fret and slide down to 1 and then back up, and you should get that sound
looks like this (dont press all the way down)
a-999888777666555444333222111222333444555666555 and so on
during the 1st verse, edge does that and also strums the 1st 2 notes of the a chord (see above)