My husband's friend stopped over to show off his new car the other day-A brand new Mustang converitble. In the back was his 6 month old daughter rear facing in an infant car seat. I was a little disturbed because I've been in the back seat of a convertable, and I hardly remember it being big enough to properly secure an infant seat. Not to mention he was driving with the top down. But anyways-Does anyone know if that's safe? I'm not going to say anything