British psychologist Richard Wiseman may be more attuned to Friday the 13th than anyone. His landmark survey of 4,000 adults in 2003 found that a quarter of them said the number 13 was unlucky, 64 percent crossed their fingers for luck and 49 percent refused to walk under ladders.
Not walking under ladders seems eminently sensible to me. Especially if there's somebody up there holding a pot of paint.
Of course if you're the one up the ladder then not having people walking under and into it is also a good idea.
