Stupid Riddle Joke #7: "Who is the MURDERER???"

On one cold stormy night, there is a bungalow which houses 5 friends.

"Aaaaaarggggggggggghhhhhhhhhh!!!!!!!!!!!!!!!!
Suddenly!! There was a loud scream coming from the toilet.

Ah Kow came to the toilet door, realising the door is locked from inside.
He is very strong and built.
He rushed at the door and it is forced open. And he saw Ah Neo,sitting on the toilet seat,dead with a knife stabbed on his heart.
Ah Kow said."What Happened!?"

Ah Tan ran to the scene, he was sweating profusely.
Ah Tan said,"What Happened!?"

Ah Zhu came to the scene, she was having a bad flu and keep having running nose.
Ah Zhu said,"What Happened!?"

Ah Hong came to the scene, his nose is bleeding.
Ah Hong said,"What Happened!?"

Who Killed Ah Neo??


Answer: Ah Hong is the murderer. (Because he was hiding behind the door,when Ah Kow forced the door open, the door slammed on Ah Hong's face causing his nose to bleed.)
(Ah Kow cannot be the murderer because the door is locked from inside. Ah Tan cannot be the murderer because he ran to the scene causing him to sweat. Ah Zhu cannot be the murderer because she is having running nose because of the stormy night.)