indeed it is true, as an Australian it gets annoying having to nail down everything to the floor and getting my ground harness on. When I wake up my bed is actually on the roof so I don't fall out of bed. And it also gets quite painful but thankfully there are some places with walkways that correspond with gravity but there are some rest stops cause of the blood rushing to your head a lot. I was going to attach a photo but I can't figure out how.