Yeah, funny topic and I can provide an reply too. Casper is the funny one here who keeps running into walls. Although last night while playing with Casper, Kitty ran into the wall, which was hilarious. After that, she looked us and seemed to be thinking" now who put that wall there, didn't used to be there!".

As I said, Casper is the one who mostly keeps crashing into walls, and it's always while chasing Kitty. Kitty is running ahead of him and can prevent from crashing to the wall because she sees the wall before Casper, and so Casper boy ends up crashing to the wall.