Discussion Groups / British English / January 2006

"Srage-diving" is diving off a stage into the audience.
http://www.peevish.co.uk/slang/s.htm
    stage-diving   Noun. The act of climbing onto the stage during
    a gig, to then leap off and be caught by the audience.
    Originates from 1980s punk but proliferating during 'thrash'
    and 'grunge' era of the late 1980s and 1990s.

The stage diver aims to land on the audience in a horizontal position so
that several audience members can catch him/her with their upraised
hands. If the diver's arms and legs are spread out their weight can be
distributed over more audience members.

"Slamming" is a style of dancing.
http://www.peevish.co.uk/slang/s.htm
    slam dancing   Adj. An aggressive and physical dance style adopted
    by 'thrash metal' fans, originating with second generation punks
    in the early 1980s. Cf. 'moshing'.