I was thinking about the guy in the "worst cover band ever" video, how he tries to copy the echoing "hello" part at the beginning of Comfortably Numb. It made me think about how bands have to rearrange their live material. For example, Enter Sandman by Metallica fades out at the end on the album. Live, they have to play it a different way to end the song. So, anyway.. for things like song fade-outs, vocal effects, drastic musical changes in the song, whatever else, that would be hard to do live... what do you do? And what have you tried that just didn't work?