I haven’t seen Paranormal Activity yet so I don’t know how spoilery this original ending is in terms of the version that’s playing in theaters right now.  But I wouldn’t recommend watching the clip if you haven’t seen it yet.  Or if you have literally anything better to do, anything at all.  Even work.  Seriously, the rest of the movie isn’t all like this, is it?  At one point it’s just a stationary shot of a chick rocking back and forth for like four full minutes with nothing happening.  If I wanted watch people rock themselves back and forth all day I’d teach public school in L.A. Zing. RopeofSilicon sez:

I will say this, watching it on a computer is extremely uneventful and not at all indicative of the theatrical experience. On top of that, this ending is nowhere near as effective as the one in theaters.

I’ve heard the new ending is so scary that if you watch it you will literally die.