Waltz

The waltz was a common style of ballroom dance on Earth. In his sixth life, the Doctor met a woman named Rebecca from whom he learned the dance. Some 80 years later in his own life, he would meet Rebecca as a teenager and teach her how to waltz, effectively meaning that he had taught himself the dance. (ST: Teach Yourself Ballroom Dancing) Later, while disguised as John Smith by the chameleon arch, the Doctor would attend a local dance and attempt the waltz with a very forgiving Joan Redfern. (DW: Human Nature)