EJ does not understand why the cats have to climb despite their handicap. Is it because they do not know or feel their handicap or do they need to prove that they are just as good?
Each time they get into mischief, EJ's heart either beats faster or skip a beat. EJ is terrified that the cats may hurt themselves unnecessarily.
One wonders will Captain Jack Sparrow HAWK's monovision enables him to gauge depth and distance as well as those with two good eyes.
EJ managed to snap these pictures which show that handicapped cats are just as mischievous as the normal.
Perhaps he wanted to test his ability or perhaps he wanted to show off that he is just as good despite having monovision.