Many years ago I found a comment by my boss in the code which read something along the lines of
-- Don't touch this code
-- It does fancy statistical maths on an iterative loop until it gets the answer
-- Really, don't touch it
-- Even if you think you kn ow what you are doing, DON'T
It served one useful purpose. It warned me that the next page was complex. It didn't tell me anything about what it was actually doing!