And the ability to heed warnings and instruction is inversley proportional to alcohol consumed (so you can't win)

Thanks Topsie, I'll think about how I phrase my 'experts back to the top' instruction. When I've seen that happen is half-way through the dance, with people who haven't walked it. Must be alcohol, not logic cos how do they think they got to the top if they wont let anyone else have a turn. (is this what they call 'fuzzy logic')