In San Antonio, TX I was surprised to find the shotgun-wielding landlady telling me to get out before midnight exactly the day before my rent was due... turns out she wanted to kick out a delinquent tenant in the unit with the same letter but one civic number over, but I can't blame her for taking direct action. Scared the piss out of me though! At least I got a free month out of it.
Probably the case of an illegal eviction. Other illegal evictions include: changing the locks, shutting of the utilities, blasting music outside the apartment at 3am.