You probably saw a flyer or advert for SC�s latest live show as a �song-and-dance extravaganza�. The word �dance� triggered sub-c memories of an acquaintance who was a dancer. This (potentially) triggered memories of a bossy and demanding ex-girlfriend and this (probably) triggered memories of why the relationship ended and your subsequent reaction (you shying away) as though to escape her.
Dreams are a subconscious recollection of memories and fears. It doesn�t �mean� anything other than a part of your brain still remember these things, and coincidental events jogged that memory.