Add the following text to before the last sentance of the first paragraph of the rule Doing the Dance:

If a move references a position where there is no monkey and attempts to access or change one or more of that Monkey’s variables in the GNDT, then the move is ignored and nothing happens. If a move references an empty position but does not change any GNDT values, then the move still is executed.
If a move references a position that is not a valid location (such as Position 0, Position Ice, or Position 9 3/4) then that move is skipped, even if it does not access or change and GNDT values.

Give Clucky 2 bananas unless 3 active monkies post comments containing the word “Orp!”

Ripped right from Clucky’s post. Seemed to work just as it was.