Ladder Survey

I stood by this ladder yesterday for an hour taking notes. Here's some bullet points :

• 143 people walked by me.
• 106 walked round the ladder.
• The remaining 37 walked under the ladder.
• Of that 37 only 9 walked under the ladder without external influence.

The external influence was me. I challenged 56 people to walk under the ladder and, Amazingly!, precisely half of them accepted the challenge with no care about Bad Luck.

There must be a book in this...