It's enthusiasm, but even that varies within a crowd. I was at a Motorhead show at the House of Blues in west Hollywood, and if you were back by the bars, it was quiet and civil, and what generally would be a lame crowd.
but if you were on the show floor, especially right up front, the crowd was going nuts.
It's all about the energy of a crowd. Sometimes the crawd will only flip out for the first minute of the hit songs, and other times the crowd will just go and go. But it does take a lot of energy. I was deaf and exhaused after that Motorhead show.
