Originally posted by: Tomland FlashP. Criss's lines were completely overdubbed because he was so trashed.
There's little question he was trashed during filming (he and Ace were both pretty far gone during this period), but the true story behind his lines being dubbed by another actor is a matter of some debate. Most dialog in a production like this is looped -- re-recorded in post-production. The official story is that Peter refused to show up to the looping sessions, so it was necessary to have another actor record his lines. Peter has denied this, claiming to have shown up for all the looping sessions. I'm not aware of any authoritative proof either way, but I'm more likely to believe the former than the latter.
A. Frehley substituted his lines for bird sounds (really)...
I don't believe that's correct. Those "bird sounds" are scripted. When Ace was interviewed by the screenwriters, the only word he would say to them is "Ack!" (Because he's a weird dude.) So they wrote his part that way. Ace nearly quit the film when he realized they hadn't given him any real lines, so they wrote him some.
eventually he got pissed and quit before all his scenes were filmed, so at least one scene has a black guy in makeup filling in.
That's his stunt man. But you're right, he was required to fill in for one scene after Ace stormed off the set.
Concert footage has to be less than 5 minutes total (presumably a last-ditch effort to prevent the film from appealing to fans)