That being said I did something similar on my CBR125 a few years back when I had the bad habit of sitting in neutral at a light. Light went green, twisted the throttle and revved it up relatively high, and quickly kicked it into first without letting the revs come down. Front tire lifted a touch. don't sit in neutral .
But the transmission sounds like my moms cuisinart blender making marguaitas . No really this bike was only ridden by my sister to commute to bible study....... they all sound like that.