AAAAAWWW...poor doggies. They almost look like their just not too sure about getting out of the car. Was the a/c on? Perhaps they liked the a/c better. Can't blame them.
You're right about the not-too-sure about getting out part - but they were totally disappointed that we weren't going anywhere interesting. The car hadn't been on - so no AC. They just decided that since the doors were open it was a fine oportunity to get my newly-cleaned car upholstery covered (again) with fur

Maggie (the Black and White dog) almost always makes that face -- shes perpetually worried looking (except when shes making the happy-muppet-face).