Back in 1978/79, as part of my degree course, I was working for a year as an English assistant in French school. I decided to pay my parents in London a surprise visit in the February half-term. I was on a ferry from Dieppe to Newhaven in the middle of the night, in dense fog. I struck up a conversation with an Australian nurse in the cafe, over a coffee. After a while we decided to go up to the lounge deck. When we got there, as I opened the door and looked in I felt there was a very eery green light in there, and something told me not to go in.