Watchful Mancat Monday

MARLEY:  I can get up on many (but not all) of the high places Ayla can.  She doesnt like that, so I dont do it often.  She needs her purrsonal spaces...

But the top of the bookcases near the highest cat tree platform is an OUTSTANDING watchplace.  I have ta jump a bit funny so that I make the leap but not hit the wall.  It takes a slight twisting motion so I land sideways.  Ayla, of course, can land up there as easily as if it was a sidewalk.  

But then my attention was drawn to a Potential Problem!

Can you guess what it is?