18. Holding up your index finger while on the phone when you get to the counter
If the barista broke your finger – or your phone – that would have probably been okay. Manners, people.
![Via sadgirlsguide.com](https://suggestive.com/wp-content/uploads/2016/02/IMG_3133.jpg)
Via sadgirlsguide.com
19. Paying in coins like you just emptied out your piggy bank.
If you were an eight-year old who sold lemonade in the summer, that would have been too adorable. Otherwise, pay like every adult would.
![Via rebrn.com](https://suggestive.com/wp-content/uploads/2016/02/LgQiAs5.jpg)
Via rebrn.com