Agree with raptor and lbss, that's a free fall there. I had the same problem in the past. You don't have to go all the way down slowly, Lance suggested me back then to always start the descent slow and controlled, then if i feel better like it accelerate. But in reality, actually thinking of slowly starting slows the whole thing down, it changes the tempo, without it being a slow tempo, just not that fast.
You will see it happen if you try.
In other news, awesome that you got 140kg, nice to see someone get some good squat up in those shoes, lol.