I saw these the other day... they are just so wonderful. I love that A)when these folks line up behind each other they use each other as a shield and B)that the person in front is totally prepared to leave their comrades behind. Also, it appears that Don Knotts, Abbot and Castello had it right... you really do look like an idiot when you are scared!The original post I saw focused on the pictures of males and was titled something like "Scarebros", which was also pretty funny.
Yes; about the lines and clutching each other. Conga line instinct.I assume this is one quick, fast film, flash picture, in pitch darkness, with the "horror" jumping at you. It could be anything. Just has to be timed right and be unexpected. Could be me in a ball cap and a speedo.