"There is no possibility that this is not going to happen. There is no plan B"
I wonder what he will be saying on Sunday. Assuming he has not by then gone into hiding to count his fortune, I predict he will be saying one of two things.
1. He got his calculations wrong and the revised date is.............
2. By their piety & prayer Mr Camping and his followers have persuaded God to change his mind. By their intercession we have all been saved.
The only scenario for which there is "no possibility" is that he will admit he was totally and completely deluded and wrong.