All the hilarious things that happened during Jimmy Fallon's 5th anniversary special

Jimmy Fallon just celebrated five years of hosting The Tonight Show with an episode like no other.

The anniversary special, featuring celebrity guests Tina Fey, Ben Stiller, and Australian TV personality Robert Irwin – all being really, really mean to Fallon – was more like an darkly funny episode of sitcom than the regular upbeat talk show. Per Esquire, the whole episode was in fact an homage to the '90s sitcom The Larry Sanders Show.

The Larry Sanders Show, starring comedian Garry Shandling, centred around the behind-the-scenes operations of a talk show, and was in fact inspired by The Late Show in the years when Johnny Carson hosted the talk show.

Fallon's five year anniversary episode gave viewers a staged look at the behind the scenes of the show, and featured some seriously funny and very passive aggressive celebrity interviews. All centred around Fallon as the talk show host with the big ego that his entire crew talks badly about behind his back.

The whole thing started with Fallon running into guests Ben Stiller and Tina Fey before the show, finding them both in a very, very bad mood.

Then, as Fallon delivered his anniversary monologue, his crew and writers room talked delivered snarky comments.

Ben Stiller then showed up to deliver his surprise appearance as Tonight Show mascot Hashtag the Panda, all while being very... unenthusiastic.

Fallon was then joined by a very angry Tina Fey, who just couldn't stop muttering insults under her breath like "maybe if you weren't popping so many pills you'd have a better sense of yourself," and "Trump got elected because of you."

Next, Fallon himself was the one to lose his temper, as he blamed "animal boy" Robert Irwin for causing a massive cockroach infestation of the studio, before panicking when he realised that he had been scolding a minor on a hot mic.

The writers room then played a prank on Fallon when he had to do the intro for Spanish language network Telemundo. The writers had Fallon, who doesn't speak Spanish, say "I pretend to speak your language, though in truth I only know the song "Despacito.""

A conflict then broke out, when Fallon denied the musical guests, Florida Georgia Line, a couch interview.

Finally, the last celebrity guest Robert De Niro, had to storm out of the studio when he encountered the aforementioned cockroaches.

Happy anniversary, Jimmy.