Trying to learn some new stuff and stumbled onto this. Gotta love the germans for their great recordings of live shows over the years. So at the 15:40 mark he starts in with a pretty cool ending to a song. He gets this gunshot noise that I think is coming from the harmonica. Once really quickly at the 15:50 mark and then more obviously at the 15:57 mark. Is this harmonica?
The first ones are William actually saying "POW" into the mic. The later kiss pops are exactly that-I will post a better example of the "POW" phrasing below.