I was sitting at my desk when I thought I saw movement out of the corner of my eye. I looked at the floor and saw something furry run under my computer. It was Zac.
We had him out of the cage earlier in the evening and our first thought was that we'd forgotten to put him back. I picked him up and was about to put him back in the 'hamster castle' when I noticed that one of the tubes linking it to the smaller cage had come loose and he'd escaped and found his way across the room. I put him back in the cage and he seemed none the worse for his adventure.