Pistons question
 

Hey i post a short vid of my pistons. emmm 5 of them are tight, their head does not easily move but one of them, the one that have a spun bearing , well it heads moves easily. This piston also smashed on the head just a bit. What are goods?? the ones with the tight head or the one with the loosen head???
here is the link http://www.youtube.com/watch?v=Xl-5VCWQkfM