"Body at Brighton Rock" is a horror film. However, it's not a very well executed one. There are a lot of jump scares in all the right places: a hand on the shoulder, a loud noise, someone jumps out from the bushes. When well-executed, the jump scare can be very effective. A prime example is in "Jaws", or in "The Shining". However, for the case of Body at Brighton Rock, the jump scare is used as a lazy way to keep the viewer awake, rather than actually scaring them. As a result, you walk away from this film feeling deeply unsatisfied.