One of the funniest lines out of Fast and Furious 6 was actually improvised by Dwayne Johnson.
The line has the most amazing genuine reaction from Ludacris too, which pretty much makes it one of the most perfect comebacks.
As Johnson walks into the shot, Tyrese Gibson - who plays Roman in the franchise - jokes: "Hey, Mia, you better hide your baby oil!"
In a bit of genius improv, Johnson immediately replies: "You better hide that big a** forehead."
Taken by surprise, Tej (played by Ludacris) laughs and ends up spitting out his beer.
The comment was completely unscripted, resulting in Ludacris' hilarious reaction, and thanks to Tyrese staying in character, the director kept the line in the final cut.
Watch it here:
Another of Dwayne's characters has recently been revealed to have a bizarre inspiration behind it.
Johnson's character in the beloved musical Moana seems to be a slightly darker truth behind the Rock's muscle-bound, rapping demi-god Maui.
Taken from Polynesian mythology, the character was actually based on a folkloric hero whose last great trick on Earth was to turn himself into a worm and crawl into the vagina of the goddess Hine-nui-te-pō.
Not quite what you were expecting? Well, let's continue.
Maui planned on 'plucking out her heart' and making mankind immortal, crawling out of the sleeping goddess's mouth when she fell asleep.
Unfortunately, things didn't quite go according to plan, with the goddess woken by the laughter of Maui's friend, and he was immediately crushed to death by her obsidian vagina teeth. Yep.
And if this is news to you, you're not alone.
Fans of the film have been sharing their thoughts on the revelation, which has left many positively shaken to their core.
Commenting on the news, one person asked: "Did anyone tell The Rock that 'as Maui' he ultimately dies from obsidian vagina teeth trying to steal immortality for mankind?"
Another quipped: "'obsidian vaginal teeth', now there's a phrase you don't hear everyday."
"Can't wait for Moana 2 then... " chimed in a third.
While another joked: "Rock versus obsidian, who wins? Who's next? You decide."
The story of Maui varies slightly from culture to culture, with the hero boasting superhuman strength and the ability to shapeshift.
According to the myth, Maui also 'fished up the North Island of Aotearoa (New Zealand), talked the Sun into slowing its movement across the sky and make the day longer for humans, and elicited the secret of fire from the goddess guarding it'.