Do you know what you think about when you are waiting for uncle Adam to come downstairs?
NOTHING! You just wait for uncle Adam.
And no squirrel, no bird, no brown dog, no biker, no jogger, no cat will distract you from the task at hand.
And your lower lip will quiver...because you are focused, alert.... and you wait.
You are patiently waiting for Uncle Adam.
[Silvieon4 's observation: if two leggeds would stop wearing rags, they would not waste so much time and we four leggeds would not be waiting for them so much! I am just saying....]