Like a drink/drug addled scene from The Hangover, Zach Galifianakis turns up uninvited to James Corden's office and just won't leave.
But Corden can relax because it's just a funny skit for his Late Late Show of course,which features Corden encountering one mammoth problem… The Zach Galifianakis Problem.
The sketch shows Zach rocking up unannounced and reminding Corden - in a clip broadcast from Corden's chat show last week - that the host had told him that "come by anytime" after their interview.
"I meant come back as a guest on the show, not come back literally!" Corden tells Galifianakis, who promises to be quiet as a mouse during his impromptu stay.
But some serious straw-slurping, snoring, fax machine-installing, and Margherita-blending end up meaing the complete opposite of this.
The Due Date star is also caught sharing a selfie in the loo while Corden takes a shower, prompting the desperate presenter to pen a list of everything he hates about Galifianakis.
"Bad energy, makes me feel uncomfortable, hates my music. I mean, the list goes on. I made a list," Corden deadpans.
And then he's faced with the biggest problem of all: asking Galifianakis to leave.
Watch the skit in the video above.