Kate seems to recognize Jack, kicks Claire out of cab

In the cab that Kate has hi-jacked, she angrily holds a gun to Claire's head and stops her when she tries to escape. Before they leave the airport, they have to stop for Arzt to pick up his bags in the road. During this pause, Jack, standing in the distance on his cell phone, looks at her and she looks back at him like she's remembers more about him than just their quick collision on the plane.

The cab driver manages to make a break for it, leaving Kate to drive. After they get some distance from the airport, she forces Claire out of the cab.