I have heard they listen in on interviews with Skype/webex/gotomeeting or the like while he first round of questions happen, then when you move to their room, the director/manager who had been listening in that whole time interview you. And they magically know a lot about the answers you provided to the other interviewers just a few minutes prior in a different room... proof they listen in. Less
In spite of the fact that it was a governance job, one of the team interviewees asked an excessively technical question to assess my depth of hands on experience - of which this position needs none, and my resume does not profess to have. It felt designed to take me off guard - but interestingly enough that person is no longer on staff and I am.