Zippy,
I had no idea the premise of the car ride was for them to slide around in the box and that by bumping into each other, that they'd bond quicker.... I learned that the idea was that the car is neutral territory AND scary because of the noise and motion and that therefore they have to stick together against this huge, lumbering noise box....... Actually the car ride USUALLY accomplishes the bonding either way you think about it...

EXCEPT when you have a very stubborn bunny.....Our gal Rosie from the sanctuary went to live with a very handsome boy named Esche and eight months later and a hundred car miles later, she still doesn't like him much, although she has CONDESCENDED to sit in her cage nestled against the wire while he sits sits in HIS cage next to the wire, so it's sort of like sitting side by side in 2 jail cells or something...... You just got to love the stubborn ones!!!!