1. From what I've read and heard, parehong malakas yung impact at nakakabingi. Kapag panget yung model kinetics nung sasakyan, you might not hit the airbag properly. Kaya you should always sit in a good driving position (wag yung "gangsta style" na naka lean back yung backrest). Top Gear has a show on it using the Renault Megane and a live test driver. It was at 30mph.

2. Not fatal, but it can cause the glasses to fly away, break, or injure the face - also from what I've heard/read.

3. The side airbags do not inflate inwards, they inflate longitudinally or vertically, not laterally. That means it just pops in right before the door panel gets squished onto you, cushioning your body/head from the impact. The side curtain airbags protect your head from hitting the hard surface of the vehicle broadsiding you. Children should be OK on the rear seats, side or center.

If the child is less than 60lbs (correct me if I wrote the wrong weight) he/she should be restrained in a child seat with a good attachment (LATCH) on the car frame.