Look to see if the seatbelts were triggered also.
Texasboy, Slimerdogs is referring to the seat belt auto tensioner. To quote Honda, "The tensioners are independent of the airbag system, so they can be activated during a collision that might not cause the airbags to deploy." If the tensioner didn't fire in
that crash, there might be a problem in the system. Either way, I would very much want to know whether the driver's airbag is good, bad, or bogus.
More info:
"Since both airbags use the same sensors, both airbags normally inflate at the same time. However, it is possible for only one airbag to inflate. This can occur when the severity of a collision is at the margin, or threshold, that determines whether or not the airbags will deploy. In such cases, the seat belt will provide sufficient protection, and the supplemental protection offered by the airbag would be minimal."
"Automatic seat belt tensioners that deployed during a crash must be replaced."