The context of the following conversation is Everyone had looks of disbelief on their faces when they heard the teacher announce the quiz, but Ash wasn't surprised at all, and fully understood what was happening.:
Ash says I knew this was going to happen..
The friend responds How come you're not freaking out? Everybody else in the class is shocked by the pop quiz!.
Ash responds It's not a pop quiz. The teacher has been suggesting we're going to have a quiz all week. You guys just haven't been paying attention..
The friend responds I guess that explains why you look so calm. I hope I don't fail it!.