When in hospital my father was delighted to discover that the man in the next bed was a very old friend and for a couple of days they were catching up on what had happened to the other since they last met.

Then the nurse gave them eachother's medication, despite it being pointed out to her that it was not their usual tablets, and my father had a large dose of a drug to stimulate his heart, and his friend got his pre operation medication.

His friend died in the night, my father had a heart attack later, after the operation, which he did not survive.

When my brother went to see our father he learned what had happened, Dad was very upset about his frind's death - he told the sister and was informed 'that never happened'. After Dad died my brother told the doctors what had happened, 'that can't happen' he was told.