The violence is bloodier and more brutal in this one.
Three people enter a room with several people in it and they all begin shooting back and forth: rubble falls from the ceiling, walls crumble, people are hit and blood sprays, and one person is kicked and punched.
A man holds a gun on three people, they chase him through a train station, he fires on them, and he jumps in front of a train (he is not hit).
Three people fight with two other people exchanging punches and kicks, and one man is shot three times (we see bloody holes blow through the back of his clothes).
A man stabs a woman in the chest with a scalpel and she falls dead on the floor with a bloody spot on her chest (we see the scalpel sticking out).
Two women are chased by a machine called a Sentinel (it looks like a metallic octopus) and one is stabbed in the leg (blood spurts) and then through the back (graphic but lasts a millisecond) and she falls dead.
One man is shoved off a high platform, and another man is slashed to death by Sentinels. We do not see this in detail, but it's clear what's going on and the mech he is in gets covered in blood (this is more scary than anything else). We also see his slashed face afterwards, not too graphic but disturbing to look at.
A man grabs a woman around the throat and holds a scalpel to her throat, she throws him to the floor, and she kicks him repeatedly in the face (we see a very bloody face with a large open gash across his nose); he then hits her head against a wall, another man holds a gun on them, and the woman is shoved down a hatch.
Two men fight, one man shoots at the other man, and one man burns the other man's eyes with an electrical cable throwing off sparks -- leaving the eye sockets scorched; we see reddened, blackened wounds.
In a scene where humans are represented as made out of bright, orange light, one man knocks another man's head right off with a metal bar; we see the head exploding in a bright flash.
When a man is "jacked into" (i.e. enters) the Matrix we see a probe being rammed into the back of his head.
A flying craft crashes into a wall, and the passengers are shown unconscious: we see one person is impaled with metal rods (not graphic but we see the graphic aftermath) and we watch as this character dies.
A man begins to glow from the inside, his flesh cracks as light shines through and he explodes into bits and then many other men experience the same fate and we see a large explosion.
We see two men lying unconscious on hospital tables with monitors attached to their heads (they are apparently comatose) and one has many cuts on one arm.
General mayhem including fighting with minimal blood and some explosions.