
how can S pass the first time with a hand clearly worth an opening bid? Either 1
♦ or 1
♠ are automatic. (I slightly prefer 1
♠).

how can N pass on his first bid ? 1
♠ is clear, although I'd consider 2
♥ if natural as I play it, but still prefer 1
♠ getting the boss suit into the picture and noting we still can have game here.

how can S pass the 2nd time? A take out double with 9 cards in the unbid suits seems totally clear.
After that, N's 2nd pass is clear, and while S could balance at the end, it seems a bit risky now and might run into trouble.
This hand is a good example of what can happen when General Whiteflag

sits across from Colonel Whiteflag