person A: I have been working really hard in school lately. 
person B: That's a good thing.
person A: Yes. I have a test coming up and I am sure I will ace it!
person B: That's really good. What class is it?
person A: 5
person B: 5?
person A: Sorry about that. I hit some wrong keys. It is a psychology class.
person B: Psychology made me sleepy lol