Adrian: Did you get your grades yet?
Bart: Yeah. My whole semester is screwed up now.
Adrian: Wait whaaat? Why?
Bart: Well, I bombed my economy final and ended up with a bad score..
Adrian: Ouch. That must hurt :/ 
Bart: Well, it's my fault because I didn't study as much as I should have.
Adrian: Why don't you re-take the class next year?
Bart: That's what I plan on doing unless I keep screwing up. How did you do this semester?
Adrian: I didn't do that bad. I ended up with a reasonable grade.
Bart: Well someone did his homework :p
Adrian: I just pay attention during class, I don't study that much actually.
Bart: Classes are boring, can't pay attention for too long...
Adrian: Anyway, why didn't you study for the economy final? 
Bart: Let's just say I screwed up more than my econ class.
Adrian: What happened?
Bart: I started playing StarCraft and ended up wasting a lot of time.
Adrian: Oooohh I know that game but you better stop slacking off.
Bart: You're right. I'm not going to play games during school anymore.
Adrian: You can play them, just don't loose focus and study for the exams :p
Bart: Let's see how it goes xD
Bart didn't do well this semester because he didn't study much. He played a lot fo StarCraft. Adrian did well thanks to paying attention in class