Kali- He has a history of going after my geckos... hence the worry. When I last moved, I made the mistake of leaving a glass gecko cage on my desk and leaving the door to the room open. I was gone only 5 minutes when I got a call from my ex-roommate that he had pushed the tank off the desk in that time and it had cracked. The gecko survived, but it was a close call. One of my parents cat's did something similar when I lived with them (when I was in school) only there were gecko casualties.

I think the snake would be in more danger of him damaging the enclosure and pushing it off or caving the lid of a tub in sitting on it, etc. I'm sure if the snake was out, he would "play" with it and hurt it that way.

When I upgrade the boa to a pvc cage that is pretty heavy duty I'll feel a lot safer about having it out around the cat.