What's the worst friendship fallout you experienced?

I had a friend who’s husband was being stationed in Hawaii and she needed to get her car on the ship to be sent over there and she wanted me to let her friend drive my car and follow her up there and I said no, I didn’t know the friend and I couldn’t go because I couldn’t take off from work. I never heard from her again. That was probably the weirdest thing but I never had any major fallouts with a friend.