I think the movie would make complete sense if at the end bursting out of the Engineer would not be an alien but M. Night Shyamalan looking into the camera, whispering: "Shyamaland!"
Or if before they do something stupid they would say it:
Before taking off his helmet: "Hi, my name is Charlie Holloway and welcome to Jackass"
Surprise shearing Dr. Shaw as she works intently on the alien head. Complete with pov cam.