+100 Having been the victim of NOT listening to my own gut--yes--pay attention!!
What is my gut telling me? (Bold font added) If my gut is telling me something isn't right, what am I hurting to be extra cautious and hang back and see what happens? At very least, making a retreat to a vehicle will either entice them to act if they do have negative motives and reveal their real intentions or they will walk by and you will have confirmed that they are not a threat and continue on your merry way.. this time able to possibly ride the elevator by yourself. WIN!!