A waitress working on Christmas day was left overwhelmed and tearful after receiving a $1,000 (£828) tip from a customer on a $17 (£14) bill. You can see the utter shock on her face below:
Callie Blue has been working at Gus' Diner in Sun Prairie, Wisconsin, for six years.
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On Christmas Day this year, Blue was working the early-morning shift, a shift that would certainly be a memorable one.
On this Christmas shift, a man named Michael Johnson walked in for breakfast at around 6am.
Johnson is the president and CEO of the local Boys and Girls Club of Dane County, who was on a mission to 'give back' to people.
Blue told CBS News that she had been talking to Johnson for around 45 minutes, with him being her second customer of the day.
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As Johnson was paying for his food, he left a note for Blue, which thanked her for 'smiling and working on Christmas day'.
As Blue took the bill, Johnson recorded her reaction with her visibly being in disbelief and shock.
In the video that has now gone viral, Johnson can be heard laughing, as Blue struggles to take in what's happened.
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Obviously what wasn't discussed in their 45-minute encounter is that Johnson was planning on giving the waitress a large tip.
Johnson said that he had grown up not being a fan of Christmas because his family could not afford to celebrate the holiday.
As an adult, he wanted to make a difference to people's lives who are in a similar position to him as a kid.
Since he became president of the Boys and Girls Club, Johnson has used his position to make donations to help people in need.
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He told CBS News: "This year we raised over $100,000. We gave away a brand new car to a family of five. We tipped several waitresses, we took about 50 families on shopping sprees and we secured toys for over 600 kids in our county."
Blue also spoke to the outlet about the surprise, saying she thought the tip was 'a total joke'.
She said: "I was like, 'This is not happening.' You always see videos and you hear this happening to other people, and you never think it's going to happen to you.
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"He was giggling and I was like, 'That's just not real.' It was really exciting. I only cried a little bit."
Blue has reached out to Johnson since the video went viral and has offered to help him with some of his charity work.
Topics: Christmas