[aeturnum]

One should not practice these things in actual high security areas, but it can be fun to simply walk around a strange place with a look of purpose and velocity. Not making eye contact, perhaps on a phone. As long as you won't get in trouble it's easy to practice the body language of belonging and that skill can be really useful even if you are not trying to use it for malicious purposes (i.e. if you are actually supposed to be there, the best thing for everyone is you look the part and don't cause more worry than required).