Cisco mentions the thought of playing GaGa to wake Ralph up which refers to when he and Caitlin played GaGa to wake Barry up back during Pilot, in 2049 Nora's friend Lia played GaGa to wake her up in Godspeed (2019), That method of waking people up was also shown in "The Flash Reborn" and "Godspeed", also as a reference to "Pilot". See more
I always wanted to be a hero, to use my extraordinary abilities to help people. That's why I came here. To meet my family, stop Cicada, help fix the Flash's legacy, and save him from disappearing in the future. I believed I could do the impossible, but I never imagined it would turn out like this.