I would most likely cooperate with the robbers. In most robberies the offenders just want what they are comming for and no resistance. I would also try to get as many details about the person such as: the voice (dialect, accents, slurs in speach etc), a physical description (height,weight, bow legs, fat head etc), and I would try to look for anything special like what type of undershirt if I could see it from him collar area, shoes are very important, sock color and special marks like tatoos, fingers (rings, scratches etc). Most of all I would just try to stay calm and cooperate so that I could be safe enought to give the police as much info as possible. Hope this was informative.