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

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