Saw:
saw is known for its great plot twists many of which you would never expect or see coming possibly down to the fact that the situations are so extreme you have no idea how the characters will react
originality as before saw America was used to slasher psycho horrors such as jason and freddie saw in its own right was a new breed of horror film
the portrayal of jigsaw as a monster because of his morals and ethics regarding life and how it should be treated
Scream:
the story line is believable as one psycho reeks havoc in a small town where everyone is suspicious of everyone else
for 1996 the use of gore is pretty great compared to other movies of this age
scream was such a good slasher horror due to the use and build up of tension
28 days later:
the special effects in 28 days later was extraordinary with every zombie every piece of gore and every injury looking so realistic
well edited the shots and transitions used led to a cinema masterpiece
although its a sort of sci fi it has aspects of realism with the charachters reactions to the situation being believable
