Where am I?

Waking up... what's this?
I can't move! I can't feel...
I can't see much.

I'm not lying, I'm vertical.
Nothing beneath my feet though,
Am i hanging?

Try to scream: "..."
I can't make a sound!
My mouth is sealed.

Peaking through the hole in front of my eyes..
A cellar? An underground parking lot?
Concrete walls, a metal gate.

Wait... another figure!
Black latex, hanging on a chain.
An another one, and another one...

What happened?
Who did this?
Where am I?