To me, it shows that they (the ones on the cart) really don't believe armageddon is coming any time soon.
If they truly believed it how could they just stand there passively knowing that nearly all of the people walking passed them are going to be killed within the foreseeable future. Surely they should be trying harder and not hiding behind a cart looking at their phones or drinking coffee.
At best is shows a complacence and at worst it is sheer arrogance and shows that they absolutely do not care about people at all.
IF this is supposed to be Gods way of warning people that he is going to bring destruction on the planet, it is a despicable, lazy way of doing it.
"Jehovah' is no better. He would know (if he was real) that people are more cynical than ever and already have information overload. Does he REALLY think that people invisiblly hiding behind a cart is the most effective way of saving lives?
They make me sick with their piousness.