4 - frame illustration of air bag deployment:

Frame 1 shows air bag undeployed (prior to crash) with crash test dummy in normal driver's seat position.

Frame 2 shows air bag fully deployed with dummy still in normal driver's seat position

Frame 3 shows dummy moved forward with face immersed in air bag

Frame 4 shows dummy moved back into driver's position, propeled by force of crash and air bag, air bag beginning to deflate

Timeframe between frame 1 and 2 - approximately 1/20th of a second

Timeframe between framd 1 and 4 - less than 1 second