Just that. Friend kindly offered to take my DC out for the afternoon with her DC. I just noticed last minute that she's wearing beach flip flops to drive in. They've gone off and I was left thinking I should've said something, because as far as I'm concerned flip flops are dangerous for driving in and she's got my kid in the car. They're not just popping round the corner either. But wtf could I have said without sounding like a nob?!