^^ that is why there is something called "situational awareness". this is about knowing your environment at ALL times. it is a constant, deliberate effort to observe and determine all possible threats.

when you are driving you are suppose to check your side mirrors and rear view mirror every few seconds, di lang sa harap nakatingin. you are also suppose to look far and near. that is just defensive driving di ba. situational awareness is taking that defensive driving practice to a higher level, this time not just assessing what other drivers are doing and possibly do, but assessing if they are a threat. you then try to predict what this possible threat will do, even doing tests of your suspicions (like speeding up, changing lanes or making turns). it also requires to be aware of possible ambush points, like in this particular case while crossing a hump on the road. you also make plans and prepare - pag hinarang ako i floor the gas and aim for the bastard, get your gun from its hiding place, lock and load.

kung mahilig ka sa guns, or even simple personal security, meron available info about this topic sa internet and gun magazines/publications.