the sounds that crowds make. usually a sound of surprise and then pleasure at the outcome of the surprise. the classic example is the sound that is heard at a fireworks display.
it can also be a sound that an individual makes when extremely pleased with a present, or anything pleasing.
bang...ssssss .... the fireworks shoot up into the sky leaving whispy smoke trails, then BOOM!!!
the crowd,"Uahz", as a radical display of a thousand small sparkles lights up the night with a rainbow of colors.