The parking lot pavement is dry when when Tony gets in his car, then it has puddles all around the car in the scene immediately after the explosion.
In the close-up Barnaby is holding the goblet of wine just below his mouth, but when it changes to a shot of all three people, Barnaby is holding the goblet as it sits on the table.
JR Jones, who's Barnaby's 2nd cousin is from Chicago, but speaks with a NY/NJ accent instead of a Chicago accent. Mark Shera who grew up in NJ, plays JR and used the same NY/NJ accent in his previous show S.W.A.T.