During the solo, Slash's cigarette appears and disappears in between shots.
Inside the church, Slash is wearing his famous top hat and still using it while he's going of the building. Outside of the church, when he's about to perform the solo the top hat is no longer visible and he's carrying a guitar that wasn't seen before.
As evidenced in the earlier scenes and a few moments after the solo, the wedding takes place on a monumental church, same place Slash is seen getting out to play his solo. However, Slash's solo happens in an area next to a small chapel, a strange contrast to what was presented early on.