> > They might be really stinky mattresses... > > That alone should be incentive to not accidentally fall during filming the action > scenes. > > > One of the producers instructing actors or stunt performers: "One or two mattresses > might have poo stains or even poo on them. We're not sure ourselves, but they are > mixed in there with the mattresses. So avoid falling and let's get this film action > scene wrapped up...okay!?"
No. They were borrowed from the porno studio in the adjacent lot.