I have a homemade throwhook I use. Generally, you can give the hook a couple good whips and it will loosen its grip on just about anything. Then you can continue to get it to swing into position, much like a throwball.
I use it quite often and have yet to get it stuck (but that surely doesn't mean it can't). I imagine this DMM product is much better than mine, and based on its looks, would be even less likely to get snagged.
I also connect my throwhook with a steel caribiner. It adds weight so that those you can manipulate the hook with those whips much easier. Especially when you run into a decent amount of friction, on say, a thick conifer.