Air bags (the SRS system) use all kind of information to decide if they should deploy. Inertia sensors, vehicle speed sensors, occupant sensors and actual crash sensors.
In lower force impacts the system decided what's needed. Sometimes it will just fire the seatbelt pre tensioner other times, nothing at all.
It's all normal and it's how the system is designed to work.
The hit, being a front end "clip", is unlikely to trigger any of the above.
