Let horror form changelings break out of welded lockers

[UrsulaMejor]

It would be nice if even welded lockers would eventually pop open. We got rid of buckle cuffing. Why should this be different?

BANG! BANG!
BANG! BANG!
-2 minutes later-
BANG! CRACK!
Metal flakes fall from the Locker's latch!
BANG! BANG!
BANG! BANG!
BANG! BANG!
BANG! CRACK!
The locker flies open!

I support something close to this.