What does Matthias do when he gets to Jasmin's apartment building?

Matthias pushes his way past an elderly woman when he gets to Jasmin's apartment building. He shouts for her to call the police. Then he runs up the stairs to find Jasmin's apartment. He does not find it on the third floor but on the fourth. The door is cracked open, and he realizes Hannah is there. He hears a crash and a scream and he prepares to run in and attack.