A very gory nightmare I had last night

I swear I didn't watch any horror movies for over a year. I do not know why I had such kind of dream last night. I believed I was kidnapped by my old friends. I was using my swiss knife to escape and actually slaughtered a few people which was holding me. I don't think i've to get into details but it was very gory. It's something that I'd not ever do in this life. I was able to escape, i believe i had some kind of supporters backing me up after the escape. I was in fighter mode. Leading a small armed resistant group with SMG. I got all the gadgets for it.

My dream ended with myself getting in a bus without money. It's a broken dream.

The entire event took place in HK + China.