Is it normal that i'm in a mental institution?

Oh boy.

Basically I got really drunk, beat the hell out of two people, then the cops had to chase me all over the city. When they caught me I went for one of their guns, he grabbed me and twisted my arm, putting the cuffs on. In the car he asked why I lunged at his holster and I said "to get the gun" he turned around and looked at me with the strangest expression. They then took me to hospital instead of the station, I was then admitted to psychiatric lock up for four days while doctors questioned me about all this stuff. The next day I tried to "walk out" or escape (and that's the weird thing, why would I escape? They're going to let me out anyway soon) from my section.

It was all because when I drink I lose the control of my impulses to the point that I feel like I'm floating behind my body, watching it go on on a rampage. I always just joke that "my mask slips off" when I drink heavily. My head doctor said I have an enormous amount of hostility under the surface, that she has seen it before but it's very uncommon. Something of a seething disgust toward both myself and others. So when I get drunk, it comes up, takes over and the shit hits the fan.