A reliable TV shorthand for an incompetent lawyer is the inability to hold on to important papers without dropping them all over the floor. This is why all your best lawyers have superior hand-eye coordination and a history of athletic excellence.
The last picture is from an episode of Law and Order, in which ADA Ross drops her papers on purpose so that the defense attorney will assume she’s incompetent and not take her seriously. Thus, the poorly coordinated lawyer trope combines with the pool hustler trope for a great bit of legal maneuvering.