Ghastly fun Chilling and sharp (spoilers!)
Danny Boyle tips his cap to George Romero's "Dead Trilogy" and Boris Sagal's "The Omega Man" a highly underrated sci-fi film starring Charleton Heston. "28 Days Later" is a crisp horror movie. It has the positives of being a gritty, realistic low-budget film without the drawbacks of bad acting, cheap thrills or pretentious ham-handed preaching.
I think great horror movies must have some of the "three levels of fear" They should have "jump" moments where something happens suddenly and unexpectedly to startle the audience. They should have the "rising dread" situations where the audience or the characters (or both) know something horrible is about to happen. Then there is the "pyschological concept" fear the basic human understanding that a situation is "screwed" or irreparable.
Spoiler time:
There are a few particularly horrifying (startling) moments in the movie including the scene in the church, the "candle" scene, and the stairwell scene. On another level of fear: Excellent tension is sustained, both in leaving the city (an eerie tunnel sequence pays homage to Stephen King's "The Stand") as well as the strange quirks of the rag-tag military group. The final level of fear is the societal implications. Are we truly a society of consumer-crazed aggression? Is everybody else a danger to us? It certainly puts the condition of our species under the microscope. There is a scene in the film (in the store) straight out of "Dawn of the Dead" and the captive "infected" is reminiscent of Bub in "Day of the Dead". The acting is quiet good for the most part and adds to the realism. Definitely worth seeing in a darkened theater to heighten the impact.
3 levels and fantastic zombies
Boyle definitely hits fear on all 3 of the levels you mention. That and a host of interesting criticisms (on activisim, the nature of the undiseased etc) make for a very compelling narrative. I loved it.
P
Oh, and fantastic zombies.
Zombies are Undead creatures
The infected in the movie were not undead. They were living people, just in a murderous rage. They are more like berserkers then zombies. There was no half bodied dead creatures crawling around. They would be exactly like fighting someone who is high on tons of drugs, they feel little to nothing, but if they get shot in the heart, they die. Head smashed in, they die. you get the idea.