Forget video, audio is where to go, with motion detection. Scratch, scratch, knock, bang, "Help can someone let me out of here, I'm still alive. Come on this isn't funny anymore, please let me out."
"Two strings walk into a bar. The first string says to the bartender: 'Bartender, I'll have a beer. u.5n$x5t?*&4ru!2[sACC~ErJ'. The second string says: 'Pardon my friend, he isn't NULL terminated'."