After Train transports everyone across the narrow bridge over the lava, he slouches down to the ground in relief. In the next shot he is standing straight, looking normal.
When Dylan is supposed to be playing guitar for Ermintrude's concert, he nearly falls asleep before coming round and starting to play and sing 'You Really Got Me' by The Kinks however Dylan is playing an acoustic guitar whereas the music has clearly got an electric guitar and not an acoustic one playing, this is particularly noticeable during his solo at the start of the song.