Subaru 2014 BRZ Owner's Manual page 115

1-7. Safety information
Examples of the types of accidents in which the SRS side airbag and
I
SRS curtain airbag will basically not deploy
The SRS side airbag and SRS curtain airbag are not designed to deploy in
most cases if the vehicle is involved in a frontal collision or is struck from
behind. Examples of such accidents are illustrated.
Second impact
In an accident where the vehicle is struck from the side more than once, the
SRS side airbag and SRS curtain airbag deploy only once on the first
impact.
Example: In the case of a double side impact collision, first with one vehicle
and immediately followed by another from the same direction, once the SRS
side airbag and SRS curtain airbag are activated on the first impact, they will
not be activated on the second.
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The vehicle is involved in frontal collision
with another vehicle (moving or station-
ary).
The vehicle is struck from behind.
First impact
SRS curtain airbag
SRS side airbag