These kind of managers you will always see in the corridor, ten steps away. These managers you usually meet with their backside faced to you with their hands in their pockets. When you talk to them, their thoughts keep staring out of the windows.
Some managers forget everything.
These managers just delegate everything to the secretary. If he is good, He knows what she must do. These managers don't really know anything at all. They let YOU give answers. Meanwhile they fill the time with nice anecdotes of irrelevant cases.