The Wonder Shell is also about courage, according to Joke: “I have had to do and do courageous things in my life. For example, I have traveled alone. That was in the eighties, so that was different from now. And I was I used to be very shy. I had to get to know people. So I had to get over that shyness. I think there were some things in my life that really took courage thinks you should do it anyway.”