Omg, I did this! It wasn't a new car; I just wasn't used to driving it! I was taking the bus to and from work so my husband could have the car for his bigger commute and just plum forgot I drove it that day because he was off. I assumed when I got home and didn't see the car that he went on an errand, but then he was washing dishes, and I asked "where's the car?" He dropped his dish and looked at me with his jaw on the floor. We called his brother to take him to get the car from work. That was about 10 years ago, and we still laugh about it.