hypothetically.

There is an event. Visualize a fire truck passing on the street. The lights are flashing, but the siren is silent. You (you are our protagonist, for now) face away from the street, toward a window. It is night. The window is reflective. The facade of the building catches the light from the truck. The image of your face is reflected in the window.

Do you
a) turn around and look at the fire truck?
b) watch the reflection of the truck passing?
c) watch the reflection of your face as the truck passes?
d) look away, watch your shoes or the bushes, etc.?