Old dream: Pyramid train

This one dates back to October 2007.

I'm in a dark tunnel speaking to my mum. My sister is also there. My mum walks off, and my sister and I are left. All of a sudden, a train rolls into the tunnel, and the music starts to go all Silent Hill. I also notice that the front of the train resembles Pyramid Head's head. Just then, I notice the train starts to slowly transform INTO Pyramid Head, so I turn and tell my sister we need to get out of here quick. However, she's faffing around and not listening to me, so I grab her hand and we both run out of the tunnel. At some point, I think she slips or I lose her, but I keep on running anyway. I manage to escape the tunnel before Pyramid Head transforms and then I wake up.