Gurren Lagann - Episode 20 of Back Arrow has a What else?

Episode 20 of Back Arrow has a "What else? COMBINE!" Reference from Gurren Lagann. Kazuki Nakashima was the writer for both Gurren Lagann (2007) and Back

This HAS to be a reference, right? (My Adventures with Superman Ep 6) : r/ gurrenlagann

Spoiler] Kill la Kill X Tengen Toppa Gurren Lagann : r/anime

Gurren Lagann: Specials (2007) — The Movie Database (TMDB)

Back Arrow - Episode 20 discussion : r/anime

Christianity in Gurren Lagann : r/gurrenlagann

Gurren Lagann ep. 20, How Far Will God Test Us? Review - Fresh Takes #19, RPC

Back Arrow Episode #20 Anime Review

A Rewatch to Pierce the Heavens - Tengen Toppa Gurren Lagann Episode 20 Discussion [Spoilers] : r/anime

Gurren Lagann – 15 – Random Curiosity

Gurren Lagann – 13 – Random Curiosity

To hell with details, what planet is this? — I've watched the twenty-fourth episode of “Gurren

Back Arrow Anime-Planet

Tengen Toppa Gurren Lagann Episode 20 Reaction Mashup!!