If you dream tentacles creeping out of bag, its dream interpretation is something bad.
Dreaming of creepy things like mysterious, frightening things, means you were anxious and stressed during your previous day. Your negative thoughts stimulated the creation of a negative image like tentacles, whose body is not seen, because it has no real basis for existence. This creature is not real, except in your imagination and dream.
This fearsome dream creature may appear in a variety of other manifestations like tentacles creeping into your window, from the outside.