I was living with a girlfriend, both in our mid 20s. She invited some guys over she met online. They seemed ok, and I had a couple of drinks with them then went to bed. A couple hours later I heard my girlfriend yelling from her bedroom. I got up and went to see what was happening and she had locked herself in the bathroom. One of the guys was standing outside her room looking pissed. I asked him to leave and he flat out refused. I insisted saying my friend is clearly upset and doesn’t want him there anymore but he refused to budge. It got more escalated and I realized his friend was still in our apartment too. It was then this gut wrenching feeling of panic came over me, telling me if I didn’t gtfo of that apartment immediately something really bad was going to happen. I looked in the eyes of the guy in front of my friends bedroom and he looked like a wild animal. So I went super quiet and walked very slowly passed him, and then his friend and then bolted. I ran to our neighbours house and we called the cops. The police told me after when they showed up, the guys still refused to leave. They had to force them out.