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Robin Williams is regarded as one of the best comedy actors of all time – in large part due to his extraordinary ability to improvise some of his most iconic lines.
His portrayal of Sean Maguire in Good Will Hunting is just one on an extensive CV of stand-out roles, and one that saw him pick up both an Academy Award and Golden Globe for best supporting actor.
Williams' character is asked to provide court-ordered therapy to Will Hunting (Matt Damon), a unrecognised but troubled genius, as the two build a fascinating and unlikely friendship.
And fans of the film think one moment between the pair perfectly sums up just why the late actor was so well revered, during a scene which made the final cut but was never in the script.
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In one of their first therapy sessions together, the two characters begin to talk about finding love and the pursuit of the 'perfect' partner.
After a short lull in the dialogue, Williams launches into an anecdote about the appeal imperfections, saying his late wife "used to fart when she was nervous".
"She had all sorts of wonderful idiosyncrasies," he says. "She used to fart in her sleep. One night it was so loud it woke the dog up.
"She woke up and would go like 'was that you!?' and I'd say yeah, I didn't have the heart to tell her."
The scene was improvised on the spot
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One of the movie's most memorable lines leaves both Williams and Damon in stitches during filming, and eagle-eyed viewers believe even the camera operator can be seen struggling to contain laughter.
As Matt Damon doubles over holding his stomach, the frame can also be seen noticeably shaking as the camera fails to hold still as it had previously.
It was shared on Reddit, with the caption: "Robin Williams improvised the story, and the cameraman found it so funny, you can see the camera shaking."
In the original script, Sean shares a story about how his wife would turn off he alarm clock during the night, making him late for work – far different to the scene that made the final cut, as reported by VT.
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It says: "The uncontrollable laughter from Damon isn't scripted, but a genuine response to the improvised line. In fact, there are some out there that believe you can see the camera shake a little – attributing this to the cameraman barely restraining his own laughter at the surprise line."
Fans loved the small detail about the popular actor, with one writing: "There are SO MANY stories of Robin Williams doing stuff like this."
A second said: "What a true treasure. A magical man. He will always have a place in my heart."
Another simply added: "Dammit I miss Robin."