Rose: I wish I could, but I'm driving the bookmobile for the Grief Center tonight.
Dorothy: Oh, I thought you do that that during the day?
Rose: I usually do, but I got tied up at work and I didn't have time and now I feel so guilty. There are so many depressed people with nothing to read. Of course, when I'm depressed, I can't read. I knit. Maybe I should drive a knitmobile.
Sophia: Maybe she should drive a nitwitmobile.