I have a houdini as well. My big male found a way to push his sliding lid open on more than one occasion (he is no longer housed in that cage lol). A couple of times I found him soon after before he'd had a chance to go hide. But one time he was able to hide from me for 5 weeks. I was convinced that he had managed to escape my apartment until I found him out of hiding, crawling through my apartment in the middle of the night. He was pretty dehydrated but otherwise OK.

This one is always looking to escape and just when I think I have him secure, he will prove me wrong.