[Craig.a.c (Craig)]

I will have to give this a go some day, sounds interesting.

Originally Posted by kinetic

Yep this came up years ago on a Dr Karl session on JJJ radio.
The air 'sloshes' in the car on accelleration so the balloon
goes towards the less dense air.

A few things need clarifying first though Alex,
Is the car owned by a reality TV couple from US?
Is their son hiding in the boot?

Steve

That made me laugh.