Fear the Walking Dead (2015): Passage: Part 14

A mining cart rattles down the rails, drawing the attention of the border patrol guard who is searching for whoever set off the booby trap. He goes to investigate as a second unidentified border guard approaches. When he rips the cover off the cart, an infected is shoved into him by Sierra, who then jumps over him in the confusion, She smashed the second guard over the head with a bat. Sierra is about to climb a ladder to the surface when she hears Gabi calling her.