I've seen all three and I'd put them in this order:
FD1
FD3
FD2
I'm watching it (even though I've got it on DVD) cos I think its clever and original cos the thing thats after them is a known force and not some guy dressed in a monster suit who can be killed. I also love the way each death is "set up" like some macabre version of Mousetrap.
I set it up to record it tonight as I was out (performing on stage), got home and found it had not taped. Luckily I got home just after half nine so continued to tape from there, hopefully haven't missed too much!
You know when Alex and Carter are on the ground, and that big thing swings round towarRAB them? I assumed only Carter died from it, but it doesn't look like Alex is in FD2 (which I haven't seen). Did Alex get killed too?
He died in between which is why Clear books herself into an institution, because after Alex dies she knows she is definitely not safe - not that she ever was though .
I love the first one, but really enjoyed the second one too. I haven't seen the third and am worried that it'll be one movie too far in the series.