Until I watched one of the Disney Sing-Along Songs videos in my elementary school music class, I incorrectly assumed the song "Supercalifragilisticexpialidocious" was from Diagnosis Murder, but after I watched a Disney Sing-Along Songs video in my elementary school music class, I realized the song "Supercalifragilisticexpialidocious" is from Mary Poppins. Why do you suppose I incorrectly assumed the song "Supercalifragilisticexpialidocious" was from Diagnosis Murder?