Two things:
- Why did Roger topple his drumkit at the end of the show?
- They walked off very fast after Jailhouse Rock - Freddie and John were offstage before the playback of GSTQ even started. It's difficult to say why, so this one doesn't really demand an answer, just speculation. Maybe this just what they did at the time, and they'd yet to start standing at front stage and bowing like they were by 1977 (we have no other footage of God Save the Queen from 1974 through 1976 - Hammersmith and Hyde Park both lack it). Or were they particularly eager to get going that night because of a fairly unresponsive audience?
tomchristie22