Recently while at the Getty Museum in Los Angeles I saw three guys watching the cactus garden ... er...grow. What else could they be doing? Why look at cactus in the first place?
Maybe there is a mystical power coming from the cactus that draws people to the railing even if they don't want to be there.
I was a long way from them as I used a telephoto lens to compress the scene from quite a distance. So I think I was out of the range of the cactus and thus, was not affected by the plant's mind control tricks.