Yes, although they are not common. This can be done by landing on your shoulder with great force or having your arm forced backwards while it is outstretched.
If your landlord breaks into your apartment or enters it without notifying you, this is grounds to break a lease. You can't break a lease just because there was a break in, however. Landlords are not...
No. Winging Posterior movement of the medial border of the scapula, Rotation about a vertical axis. Tipping Posterior movement of the inferior angle of the scapula, Rotation about a transverse axis