LOL! With this, I've had a total of 4 escapes (well.. they were more, but I'm counting a consecutive escape as 1... I'll explain...)
1. My first syrian hamster, Chiquitin. I had her in one of those habitrail thingys (or something like that). That was about 9 years ago, and they came with a plastic lid that had a little flap stuck on the inside rim of the opening... get what I'm saying? LOL... well, the thing is that every night Chiquitin chewed that flap out and escaped. Now, the really impressive thing is that she expent the night out and came back to her cage (which was a series of cages conected, and the one she escaped through was on the floor), and closed the door after her (not too well, but just to make me think that I had closed it wrong). My sister insisted that she was escaping but I ignored her cause she's very afraid of rodents and thought she was just being paranoid. One night we stayed up watching and saw her. I put all sort of things to secure the cage, but somehow she managed to get out anyway, and my sister mademe take her ouotside.
2. Chiquitin again, once I put her outside (on the garage), I had her in a 20g tank. After more than a year of being there, she learned to open the screen lid too, and escaped. I never saw her again 8( She was the most intelligent hamster I've ever met, and possible the cause of my obsession with rodents 8)
3. Frank, my last syrian hamster. The screen lid to his 20g tank had a small plastic lid which he learned to open. One morning I went to the bathroom at about 7:00 am, and when I was coming back, I met with him in the way to my room. He just froze there. My sister and me suspect that he thought that if he didn't moved, we didn't see him, cause he used to froze everytime we surprised him. Either way, he was really easy to catch. I sealed that plastic lid afterwards.. LOL
and now, my fourth escape, the mice one. I think that syrians are the most prone to escape, though. None of the other rodents that I've kept have such insistency on getting out as syrians have.