The most dangerous form of skin cancer, these cancerous growths develop when unrepaired DNA damage to skin cells (most often caused by ultraviolet radiation from sunshine or tanning beds) triggers mutations (genetic defects) that lead the skin cells to multiply rapidly and form malignant tumors.
In 1978, the Broadway musical and tribute to Fats Waller, Ain't Misbehavin', received a Tony Award as Best Broadway Musical.
Dad's melodic line triggered the key phrase (Ain't Misbehavin') in the lyric and Andy's lyric launched more music. In less than half an hour the two men fed each other ideas so successfully that the song was almost an effortless lark (Waller and Calabrese. Fats Waller, 1977, p. 86).