Gremlin Locked in Room During Showing

A recent showing was met with loud noises behind a highly secured door. These weren't your typical domesticated pet noises but rather something like this, "GrrrrAAAAAwackwackwackGrrAhhhhhhhhhhhh"
When the seller was asked why he went with the Bungee Security System rather than ADT or something more local like Schlage or Kwikset, he responded, "Oh, that, uh, uh, that's just to keep the door shut cause, you know, uh, it, uh, like opens, all the time.
"GrrrrrrAAAAAwackwackGrrAhhhhhhhhhhhhh"
Humboldt Park