Talk about summer dreams ripped at the seams. This theory claims Sandy actually drowned on the beach and the entire events of Grease took place in her subconscious while she was in a coma. We know from the song “Summer Nights” that Danny “saved her life, she nearly drowned,” but maybe he didn’t get to her fast enough. As depressing as this theory is, it does explain why Sandy and Danny’s car floats off into the sky at the end of the movie–this signifies Sandy actually flying off into heaven. Totally macabre, but not totally unbelievable.