i think that is something all cats do!!!
maybe they don't all climb walls, but mine will get sudden bursts of engery and tear up and down the stairs jumping over things and on top of things!!!
and this they do by themselves, not even playing with any of the other cats!
though about climbing...milo loves to jump up and sit on top of any open door, then he'll start acting frisky up there and i'm always afraid he's gonna fall and kill himself!!!! :lol:
oh yeah and milo loves to climb the christmas tree too!!...brat!!!