Lots of blood and gore. The titans are humanoids that dismember and eat humans.
In the chapel scene, Titans destroy the roof, and blood and hands pour out of the door.
Soldiers are cutting the Titan's Neck, the only known method on how to kill a Titan.
In the crowded alley, a Titan's hand grabs multiple humans. Then, the body parts are thrown away to the running people in the alley (blood splashing).
While they are having sex, a girl is caught by a Titan. She is swallowed.
When one of the soldiers realizes that there's nothing he can do to defeat the Titan, he grabs his gun while his female companion tries to stop him, unfortunately he pulls the trigger into his mouth. Blood splashes in the girl's face.