There’s two ways to flub your landing with too much vertical velocity (IE coming down too hard)
One is settling with power. You are coming down and you pull collective to arrest you descent rate but there just is not enough powerrrrr and the machine goes crunch.
The other is a vortex ring. You are coming down without much horizontal (forward, sideways or backwards) velocity and they blades are having to deal with their own downwash. This makes them far less effective at carrying you, and to add insult to injury, pulling more power will only exacerbate the situation! When that happens, a little sideslip (stick and rudder, coordinated and immediately arrested!) will get you out of the vortex ring. Or just push forward, get some speed on the bird. Go around and try again.
The trick to landing a huey is to take it slow and careful. Be gentle. You do not have a huge power reserve and no magical russian flight computer to take care of the wobbles. Take it easy. Gentle. Easy… easy… there.
Once you have five hundred landings and a thousand hours on the bird you get to throw it around and slide it in like in the movies.