Because it's all the rage round these parts.
Firstly park your car on a busy main road. One with a speed limit of around 40mph+ should suffice.
Secondly ensure your car is a BMW or Porsche 4x4 for maximum style points.
Thirdly. Open the back door (the one that opens into the road naturally) to its maximum stick your arse in the air and slowly remove/load baby and car seat into the back seat whilst you leave the pushchair/pram in the middle of the road. Preferably with a child still in it.
Brilliant idea isn't it and I cannot for one moment think why AIBU :o