marvin gaye began to sing from the loudspeakers of an oldies record shop called the wax museum ; the words , backed by a jive disco beat , seemed like a dream of the past come to life : `` let 's dance ... let 's shout ... get funky what it 's all about ... let 's dance ... let 's shout ... `` a power transformer blew on maple street and a gaudy spiral of purple sparks drifted down , lit on the wet grass , and went out .