One morning, I was riding along my bicycle around town and I stopped outside the shopping center as there were 2 old-persons, one man and one woman (let's call them A and B) standing outside and talking, both having bags of groceries, and rather having a really strange conversation :-
A :- Did you hear the news about a house that got burned down last night?
B :- Yes. A woman died in the fire. I wonder how it got started.
A :- It was arson who started the fire.
B :- What really, that's scary. I am worried, aren't you?
A :- Do the police know who did it?
B :- I don't think so.
This conversation gave me the creeps and then I cycled away thinking about it. After a moment, I immediately realised something which frightened me even more and I called the police.
What frightened me even more, as I was cycling away?