What is the padlock used for?

[jo291]

Early in the game, you find a padlock. But where do you use it? I've completed the game now, with my padlock still in my inventory... I don't remember that i ever used it.

Hm, maybe you can trap dogs in the steam chambers? That would actually be cool, since you wouldn't have to kill them.

the lock will probebly be used for episode2 or episode3.