The title of this episode is a reference to the 1999 song of the same name by The Chemical Brothers.
The ring encased in amber has "R to E" inscribed on it, which is similar to Charles' ring which has "R to C" inscribed into it. R and E are likely Renton and Eureka respectively. Furthermore, Renton and Eureka have a daughter named Amber in Eureka Seven AO (2012).