Continuity mistake: At the beginning Ava shoots the man's phone out of his hand through the car window. When the car drives away all the windows are intact.
Continuity mistake: When "Brandy" gets on the back seat, her designated victim Peter is holding his minibar liquor bottle. His left hand holds the bottle cap at variable height and sometimes to one side of the headrest, sometimes the other, or above it. (00:03:50)
Continuity mistake: Final hotel fight scene. She starts off wearing shoes, and then they disappear and reappear.