Unpredictable game mechanics are always good for a laugh.
I remember when I started a rebellion before turn change in Toren certain of eventual victory. No-one told me that the rebellion code had been knackered for yonks and it would instantly fail when the turn came. Thing is, my co-conspirators knew about it, but because I was so enthusiastic about a rebellion they thought I knew something they didn't and let me do it. Awkward moment for everyone involved really >.<