"Oh Shit" moments...

I did speak to them. Both before and after. But thanks for your advice.
Your welcome :o) , what did you actually say to them? People who are walking may not necessarily be in any particular hurry, and whilst chatting to each other might well just stop at the kerb and finish the topic of their conversation before concentrating on crossing the road, its better than stepping off the kerb mid flow without looking/concentrating as some others do. Also maybe you look faster than you are so they thought they had to wait ;-)