Passenger side explosion

So I'm driving to work around 0345 and I hear and see an explosion in my car, I stop the car and get out seeing what the hell happened. I realize the passenger side curtain airbag went off, just that one airbag. I didn’t hit a pothole or anything as the road I was driving on is fairly well maintained. It’s weird because no other airbags went off; there was no one else in the car, just me. I’m not even sure how to handle this.