person A: I met a girl_comma_ and took her on a date to a concert
person B: What concert?  Did you like her enough to go on a 2nd date?
person A: No_comma_ unfortunately.  As we were walking on the sidewalk_comma_ we were approached by a couple of dirty_comma_ tough looking guys.
person B: Well_comma_ that sounds a bit scary!  What happened?
person A: I croosed in front of her and put myself between her and the two guys.