Hey guys!!

I would like some advice for correct collapsing. I have read all the guides for mills but when its time for the collapse something is going wrong?? I will try to post a video later. I collapse at the top of my right shoulder. It hurts a lot there and it is a little bit bruised. Is it supposed to go like this? Get bruised in the beginning or is this because of Im doing something wrong? I do it CW. I stab with the right hand in handglide position.
Anyways, I will upload a video soon so you can tell me what Im doing wrong.

cya!