Nineteen-year-old Mackenzie Mauller of Ohio did a good deed last week when she bought a coffee for a woman she didn't know in Starbucks. What she didn't expect was how appreciative that woman, who actually turned out to be a neighbor, would be. Nicole Clawson later happened to see Mauller pull into her home a few houses away and left a letter for the teen, saying, "I felt it necessary for you to know that what you did for me was more than just a coffee. It was something that has turned my whole day around, put tears in my eyes and a smile on my face and I feel so grateful. Thank you." Clawson said that the last couple of months had been hard, explaining that her father had died and that he'd usually looked after her children when she went to work. On the day Mauller bought her the coffee, Clawson's babysitter had cancelled and she'd had to take the day off work. Mauller shared the note on Twitter, and it went viral, touching thousands of people.