I’ve had the sense that many people believe the hip drive on kettlebell swing (which is horizontal) is the same as the hip drive on the snatch and clean and jerk (which is vertical). We know that a horizontal hip thrust with a kettlebell gets momentum moving on the weight, but it doesn’t work that way with the Olympic movements. If you want the bar to travel fast over your head, it needs to move vertically. Why? Because the shortest distance between two points is a straight line (and that really IS physics) and we want that barbell over our head in the least amount of time possible.
On the other hand, kicking the hips forward will cause the bar to bang off your body, which then causes it to swing around you and you’ll either miss the bar out in front of you or it will go flying so far back and around your head that you won’t be able to hold onto it anymore.
Our goal is to maintain control of the barbell by keeping it close to our body through the whole entire movement. The only way to accomplish this is by moving the hips straight up and straight down and LIGHTLY brushing the barbell off your hips . . . NOT banging it . . . EVER.