Actually, come to think of it, when my school did Alice Wonderland as a musical, I did have to sing "Twas Brillig" being the Cheshire Cat and all
But I remember one time I was at the mall, and I was walking through the clothes and singing to myself (probably not all too discretely though, my voice tends to carry) and this lady turned around and gave me the weirdest look, like a deer in the headlights.
