i think counter smash is just a wavedash back into a smash attack when shiek does a dash attack/grab.I've always thought that needles go slightly under the missiles - just barely missing them. How did I miss that?
Edit: Counter smash? Charge cancel? What is that? How do you do them?
charge cancel is when samus is charging the shot, then you hit r or l to shield and the shot is stored for another time.