Concept 24 Question #3

I'm pretty sure I've seen surprised by the outcome of something I thought I wouldn't more than once! One example I thought of was when I saw one of those annoying videos in youtube that pop out the exorcist girl's scary face with a loud scream! The first time I saw that it made me jump! I didn't see it coming! I expected something not exciting at all, but turned out the opposite! How I can use this to develop a "High Concept" script is by giving the reader something to think about, but then we launch them a final surprise! A final impression!