This last weekend was our first weekend, and we had two actors use their creativity and notch up the intensity. One would sneak up behind the group he just scared but because of his scare position they didn't know it was him. He would whisper in the ear of the person last in line, "Hey this is fun... I don't even work here." and then he'd duck off the trail and disappear. It really creeped out some of the customers... in essence presenting a perceived possible real life threat. I thought it was edgy and worked great.
You guys have any unique techniques that take the scare past the traditional startle that you don't mind sharing?