deathtrap give you a twist at every turn and every single turn and in fact it big problem be that there be so many twist that you never really get orient in the film and and it often doesn not make any sense and although they do usually catch you by surprise . the story be very good and except for the fact that it have so many twist . the screenplay be very good with great dialogue and character and but you can not catch all the development because of the twist . the performance particularly by caine be amaze . the direction be very good and sidney lumet can direct . the visual effect be fair and but than again most be actually in a play and be fake . twist way to much and but still work and be worth watch .