Jerry Almonte wrote a great post about some of the pivotal moments that have shaped Lindy Hop. I have been dancing long enough to have been around for all but one of these moments.
My favourite is Todd and Naomi's spotlight in the ULHS 2005 Liberation final. At the time I had never seen footwork executed this fast and crisp. Frida Segerdahl, sitting right behind where Todd and Naomi are dancing, starts fist pumping with excitement during their second spotlight when they do the tandem variations.