* ActorAllusion: Kato singing along to "Gangstas' Paradise"; Jay Chou is primarily a [=hip-hop/R&B=] artiste, [[NeverLiveitDown with alleged gang connections simply from the production values of his concept videos and the nature of his initial fanbase]]. Then there's him playing the piano [[spoiler:when he sees Lenore behind Britt's back.]] As for the mention of [[http://www.youtube.com/watch?v=PHrq3Ew0T-I nunchucks...]]
** More of irony than allusion, but Jay's breakout role in his native Taiwan also involved hard-and-fast driving in a LiveActionAdaptation, as Takumi in ''InitialD''. The scene with Kato playing with a basketball also alludes to Jay's earlier movie, ''KungFuDunk''. And the massacre of [[spoiler:several gangsters just for wearing green]] parallels a plot point from ''Film/CurseOfTheGoldenFlower''. This is basically ''Meet Jay Chou: The Movie.''
** James Franco as a meth dealer. What was his last movie with Seth Rogen? ''PineappleExpress.''
* CreatorBacklash: Seth Rogen has recently admitted that the making of this movie, and its subsequent failure, was a "nightmare," adding that he'd "sooner not work for a year," then do a sequel. Creator/MichelGondry also recently bemoaned his lack of creative freedom on the film, and regrets directing it.
* DyeingForYourArt: Seth Rogen trimmed down noticeably for this role, even looking a bit gaunt after his 11-day coma (though that's probably down to lighting).
* HeyItsThatGuy:
** Asian fans may know Kato as [[TheHero Takumi Fujiwara]] from the film adaption of [[Manga/InitialD Initial D]]. He is a singer, actually.
** [[Series/BattlestarGalacticaReimagined Admiral Adama]] is one of the Sentinel's news editors.
** [[Film/InglouriousBasterds "The Jew Hunter"]] is Los Angeles' crimelord.
** [[Film/Terminator2JudgmentDay John Connor]] as a meth dealer.
** As is [[Film/SpiderManTrilogy Harry Osborn]].
** Mafia boss [[Film/BatmanBegins Carmine Falcone]] is a newspaper mogul.
** [[Film/CharliesAngels Charlie's Angel]] Natalie Cook has gone into the newspaper business.
* HeyItsThatVoice - In the Japanese dub of the live-action movie, The Green Hornet [[Creator/KoichiYamadera is]] [[Anime/CowboyBebop Spike Spiegel]] and Kato [[Creator/MasakazuMorita is]] [[Manga/{{Bleach}} Ichigo Kurosaki.]]
* TechnologyMarchesOn: Today, the Black Beauty's aerial scanner feels remarkably more current than anyone could have guessed back in the 1960s with aerial drones becoming increasingly popular consumer items.
* WhatCouldHaveBeen: Van Williams, among others, pushed to give BruceLee more to do in the TV series since it was obvious that he was garnering the most viewer interest with his martial arts moves, preferably in a hour format. The producers wouldn't budge and the series was cancelled earlier than it could have been.