Mocha Bean doesn't "Run into " walls. She trys to climb them. I'll have to get a pix of it . She gets as close to the wall as possible with her chin flat against the wall, wiggles her Kittybutt and then SPRINGS! Up as high as she can...This is then followed by her Racing as fast as she can through the house followed by Bonzo and then Louie.... Makes for very loud cheap entertainment!