Sophie waves to Paige through the window (seen from behind) then passes her mug from her left hand to her right. The angle switches to a front view of Sophie, and the mug is still mid-pass. Cut back to the rear view, and the mug has jumped back to the left.
Luke hits the center of the big rig's steering wheel to sound the air horn. Those are activated using a pull-cable above the drivers door.
During the "chase" scene to catch up with Luke in the big rig, they are driving on a major road in New Orleans during the middle of the day yet not a single other vehicle is on the road.