I can completely understand where you are coming from, I can see this happening with my DS1 when he gets to school next year. Until you mentioned it was a movie I would have said that I would be one of the parent helpers...now that I know it is a movie I would be more inclined to keep him home. The trailer for that movie was quite scary for my 4 year old. I would never insist that he go anyway, but possibly revisit the issue at a later date if able.