That's a really dangerous sleepwalking, is it actually possible to be that bad?

It can be but this one's kind of unrealistic. When you sleep walk, a lot of its muscle memory. Dan already knows the apartment layout so him not knowing subconsciously the balcony there is whats not realistic. But if he was unfamiliar with his surroundings it would be a real risk

Then he could be (trigger warning) sui*idal? Since we saw him drink a lot and be depressed?

That i dont know. Ive never had my feelings show in my sleepwalking like when I was mad at my parents, I didnt go sleepwalking to hit them in their sleep lol. You're not really showing your feelings when you do it. Its literally just muscle memory. We dont move to prove a point. Everyday I would wake up get dressed and go to school, so sometimes my mom would catch me getting dressed (or attempting to) in my sleep because thats just what my body was used to doing. You wouldnt take that as "shes was so happy to go to to school she got ready in her sleep" would you?

Got it