Lee sin Q one shot golem bug

I found this bug yesterday while playing ranked. I was killing the big golem and when its splitted up in to medium sized golems, i clicked q right before it spawned and when it hitted the medium sized golem it got one shotted and immediately splitted up to the small golems. It could be a very good advantage in early game. Just saying I will send a video if a rioter is goin to reply.