Ask HN: What non-standard questions do you ask on interviews?

Jobs should be a good fit for both employer and employee, so asking relevant questions is important for both parties. A lot of attention is paid to what employers ask you, but what about the other direction?

Ignoring obvious questions (salary, benefits, etc), what kind of questions do you ask to make sure you will be working in a fulfilling and stimulating environment? As talented and in-demand individuals, I'm curious to see what the HN community views as good questions.