Well... If the dispatch have mentioned something that I don't like, then I _will_ wait for the police (normally stuff like "upset, cut self, locked in bedroom", I don't like that because they have cut themselves and so have something sharp, are probably not in the most rational frame of mind and are hiding behind a door that I can't see past.) But most of the time, especially things that are happening in the street, I'll rely on my 'danger sense' assessment of the scene. And at all times the desire for someone to hurt me is going to be a lot less than my desire to run away. So if I have to run I have the motivational edge. And for the reason you give in your comment, I tend to stay between the patient and the exit, so that I have a clear run. At least working on my own I don't have to worry about a slower running colleague... (Or rely on them running slower than me).