Attempt #3x4 (day 3, 4th attempt) to escape to the neighbour balcony : big cat made too much noise while moving stuff, and fleed at his favorite spot on the other side of the balcony to look innocent while I puted back in place the stuff closing the access.
When I went back in the room, he was looking at me like he was surprised to not be sent inside (during the 2 first days that was the case, but mostly because it was time to go to sleep xD). This smartass knows exactly what he was doing