Thinking about interaction with audience, was is it even safe to perform We will rock you with thousands people jumping on floor? I would imagine such rhytmic thumping could lead to some accidents.

What was that rocker manager pushed up neyond sticker NO, was it just volume or something else?

They say 1.5bln people watched Live aid and they show how it is the stuff excited about raising 1mil GBP which sounds like bad joke, was this considered good in 80s because even with added inflation it is still nothing from such large audience, heck 10mil viewers could raise it easily. In this context seem Live aid as utter fail without reading further about it. EDIT: OK I see they raised worldwide 30mil, but it still seem too little even for UK.