I didn't expect Exorcist to be in that list. Read upon it. A horror film that had gone over the budget, didn't have any major stars but went on to become highest grossing film for Warners even though they released only in 24 theatres at the beginning. Went to become the first horror film to be nominated for Academy awards for best picture. People flocked to the theatre in winter - many more than once. Some vomiting and fainting. Some supposedly had heart attacks and miscarriages too.