I think this is kind of a weird thing for coaches to be saying to their athletes (my coach's philosophy is that if you're willing to work, she'll coach you no matter what your ability is), but I have always had other things I want to do. In my case it's more of an AFTER gymnastics than a Plan B, because I'm going off to college in two years (OMG!!!) and I won't be at a high enough level for NCAA.
I've ALWAYS wanted to try circus or rhythmic, and some of my gym friends do circus over the summer, too. Yes, I did see that movie The Gymnast. Show choir and musicals/plays at my school interest me, too, and I know I'd perform or do lights/costumes/etc if I had time. I want to try modern dance and dance choreography classes in college, though I don't have much of a dance background. I sort of want to try debate, too - I may take a school class in it next year.