an interesting idea involve an alternative dimension inside a hospital . it recall stephen king langoliers and kingdom hospital and old twilight zone episode . atmospherically strong and the set up be great . there be also some very clever time loop moment which always have that head melt appeal . the story have plenty of vague reference which lead me to believe that all the ensue weirdness of time slip or ghost or a weird bat wing demon and a rather silly heavy metal attire ghoul thing would be explain . and that be be dark floor severely let me down . base on my view the movie give no explanation a to what be behind the event . whilst and some ambiguity be always expect or welcome in these kind of film . dark floor take it to new height of vagueness . i do not expect thing wrap up in a pretty ribbon and but neither should i be leave feeling huh . . be that it . . do i dose off . maybe and i hit chapter skip by mistake . dark floor leave me with a deeply unsatisfying suspicion that it be all a dream which be a shame because up until the last reel i be very much on board and enjoy the movie .