highway oasis

This one I heard/remember from an old job I had on a highway oasis. Apparently, a lady who worked for the cleaning staff on the oasis was cleaning the female restrooms during the graveyard shift, when an older woman walked in, and went into the last stall. The cleaning lady I guess didn't think anything of it until 15 minutes goes by, and she wants to get that last stall cleaned so she can get the fuck out of there. So she walks over to the last stall (keep in mind she never left the restroom), bends over to look under the stall to see what the hell the older woman is doing, doesn't see any legs, panics, runs over to the stall to find it empty. My manager and a few others who were working that night says they saw this cleaning lady, white as a ghost, run out of the restrooms screaming at the top of her lungs.