The North America DVD from ADV Films says 'Extras' (meaning multiple extras) on the back of the DVD box but it only has the trailer.
(at around 1h 3 mins) When everyone is up on the roof examining the water tower, a flap of cloth or pant leg can be seen at the top of the ladder. This could be something attached to the tower, but later when she climbs it by herself and we see the whole thing, no such cloth is visible.