Northville Insane Asylum Gives Me the Creeps

I live outside of Detroit Michigan.
Well there is an old insane asylum  
in Northville that is now run down.
It's boarded up and has been there
for years. Teenagers like to go in
there and mess around and do drugs.
 Well I have been in that place and
it's creepy! As I was walking through
the tunnel and it leads to the old
asylum, well I was walking through
there as I heard screaming seeming
like it was far away but it echoed
so far. I got to the end of the tunnel.
As I walked to the asylum, I was with
friends- we all got to the end even
though we heard screams. We were
thinking it was the wind. As we started
to walk to the asylum we saw a figure
standing at the end of the tunnel and
we looked at it for 2 sec and after
that it disappeared.
 So we continued on and went through
a hole in the front door. We all got
inside and looked around; we were on
the main floor when we saw old
instruments that were used for the
insane years ago and as we walked around,
we entered a room that a guy died in. There
was an old newspaper sitting on the ground of
the room saying that he was here cause of
schizophrenia.
 He had murdered his family and then was placed
in the asylum. He was tortured with tools well
you know like electric chairs and things like
that, He died in 1946 the place was condemned in
1984.
 We walked towards the room and we started to
hear talking wondering what it was. Well my
friend got attacked and had disappeared.
 So we kept walking to try and find him so
anyways we walked into a room for children
there were 20 beds, We walked in there looking
for him still nothing-we heard a noise in the
far corner of one of the beds, someone appeared
there. It was a child that was tortured while
living there so we bolted out the door.  
 As we ran outside we ran into our friend we
asked him where he was but he said he could
not remember... But then after we walked
through that tunnel I had a strange figure
following me as I was walking but after
I walked out of the tunnel it disappeared...
Still never went back to that place.