Find the old-style water hoses, the ones used by firemen. (Still present in some major buildings, like hotels.)
The water pressure from those hoses will knock normal mortals down, possibly stunning them. Even supernatural beasties will be slowed down for a bit.
Find a right-angle turn in a corridor. Toss the hoses (which have heavy brass nozzles) around the corner. When nasties approach, turn on the hoses full blast. The nozzles will act like medieval maces to everyone in the corridor. Tie supernatural Catch items to the nozzles before doing this for added fun.