A few of us in the $15-30 game had been talking about the local school systems, with most of us even talking while we were playing hands. It was a kill pot, so it became $30-60, and this one guy who had been talking a lot, raised it under-the-gun. There was a slight confusion about something, and the floor was called to figure it out. In this interim, the raiser was completely quiet and seemed uncomfortable, which I thought was very unusual for him, considering his previous patterns. This made me think he was raising either with a low pair or with something like AT or worse, which would be pretty light in this game.
Sure enough, he ended up folding and showing AT. This would have been useful info if I was in last position; I would have felt pretty comfortable raising him with a wide range of hands, knowing he was on the lighter side, and also knowing he was a fairly predictable player post-flop.