person A: My social anxiety kicked up the other day while paying for groceries and I failed at doing basic math in my hand due to my nerves. I ended up giving the wrong amount of money.
person B: It's okay. People are very understanding. Did you underpay? I'm sure it happens all the time! 
person A: Yup_comma_ I did! And I'm usually very good at math. When my anxiety acts up_comma_ it's like my brain just goes blank.
person B: We all have those moments! Sometimes you just have to shake it out of your mind and take a deep breath.