Its normal if they can't get a good purchase on what they areclimbing to fall. Just like with us. Also its normal for them to try and escape. They're little stinkers. Also if they are a bit stressed they will really try to escape the stress to find a more secure location. Have you tried to cover his enclosure completely with only a small viewing area? I have both my BPs almost completely concealed except a small area for me to check on them. Also you might be handling him too much or he's trying to get out to get more food. There are a lot of ifs, maybes, and could bes when dealing with BPs. Also it could be he just wants to be a stinker and get out and explore lol.