Big drumkits. You don't see those any more, do you? OK, we're sure that bands doing one more round for the heavy rock fathers - Def Leppard, Iron Maiden, Kiss - have enormosets, but in this 80s revival going on we're surprised bands aren't taking to arena stages with ridiculous numbers of tom-toms and snares and a couple of gongs just in case. Even the Darkness' Ed Graham was behind a fairly standard set while all around was post-ironic excess.
And don't think it was just pyro-friendly sex'n'drugs'n'rock'n'roll types either. Look at the mother that turns up 2:08 into this!