Incidentally, I had an engine failure last night. It was fairly hazy and cold evening, with an inversion right around two thousand feet. I was at pattern altitude, although wide of the pattern, doing a 360 to get two VLAs out of the way (they were way too slow, I would've caught them on final). Turning back to the pattern I realized I was a little low, so I pushed the throttle a bit forward, but nothing happened. The engine was still running, but it didn't respond to the throttle, and I was losing altitude.