Sometimes just a few seconds of situational awareness can obviate a huge problem. In this clip we can see how not paying attention can lead to big trouble. We can also see how many chances the victim had to dole out some injuries to the car jackers. And finally, if you are going to resist, go full bore. Hanging on to someone and verbally accosting them is usually a recipe for disaster.
Profiling works. Thats what allowed out ancestors to avoid the saber-toothed tiger and subsequent generations to avoid extermination and procreate successfully. If something doesn't "look right" or "feel right" listen to your instincts.