Watch Hilarious Ricky Gervais, Jimmy Fallon 'Lip Flip' on 'Tonight Show': 'Night At The Museum 3' Star Kidnapped Mom? [VIDEOS]

Ricky Gervais and The Tonight Show host Jimmy Fallon giggling uncontrollably? Sign us up! The funniest Lip Flip ever took place last night... with Gervais revealing that Fallon has a very intimate shaving routine! Gervais — promoting his new movie with Ben Stiller, Night at the Museum 3: Secret of the Tomb — also revealed that he and his family tried to kidnap their own mom after bingo, and that he "hates Christmas shopping".

The Office star also explained that he's terrible at giving Christmas presents, buying his family "100 pounds worth of scratch cards (lottery tickets)" each one Christmas, and describing his family as "if The Waltons were drunks and fighting".

In the very funny chat with Fallon, Gervais also revealed that at his mother's funeral he got the crowd laughing... by handing out tissues with 'stop snivelling you snotty cow' written on them, horrifying the poor vicar in attendance.

He also said that his family also toyed with the vicar, and when asked if there was anything about his mother the Vicar should know, Gervais' brother told the vicar, "Well, she was a keen racist". When the vicar replied "I can't put that", he was then told to tell the congregation "she enjoyed gardening then".

Not stopping there, Gervais also pointed out that his family also engaged in a spot of kidnapping! "We pretended to kidnap her once!" he laughed. "We went to bingo, right: it was me, my mum and my brother, sister. At the end, all the people were coming out, and we just grabbed her and starting putting her in the boot of the car!"

Unfortuantely, not a single person came to her aid! "She was screaming, right," laughed Gervais, "and NO ONE HELPED! They all just looked the other way!"

You can watch the clip below:

But the highlight of the interview came when Gervais took on Kimmel in a spot of Lip Flip, with Gervais's scruffy month placed on Fallon face, and Fallon's cleanly-shaven mug on Gervais.

The results are hilarious: a weird baby-headed Gervais doing a "vogue," and a weird mustachioed Fallon revealing that he "shaves his balls!"

The pair then sing a Christmas carol, "The Little Drummer Boy"... which actually gets pretty amazing right towards the end as an amazing syncopated duet. Watch it below!

As the BBC have reported, Gervais is writing a movie based on David Brent, his much-loved bumbling character from The Office, while his latest TV series Derek has come to a finish.

Night at the Museum 3: Secret of the Tomb is in cinemas on Dec. 19. You can watch the trailer for the much-anticipated movie below.