I'm talking about the thing that looks like a stick within the picture..from the person's crotch to the floor (in non-colorful scans) The one at :21 (or close to then) in the link I just put has a lady in a lavender shirt with a black stripe. I don't see a bar along the right side in that one.
If it was a heat thing making the stick show up, it seems like there should be some from the armpits too (maybe?)


A Thermal Bigfoot Seeker will help your search a LOT!
Toting one of those along is a good idea.