Semester Exams...

The room was silent.
The students were absorbed in their Algebra exam: factoring, simplifying, solving equations.
The teacher was walking about the room monitoring progress and checking calculations. This teacher was thinking, "Semester exam time is hard on everyone.
Students are anxious...
Teachers are under pressure..."

Then the teacher farted. (loudly)
"phffffffpbtpbtpbtpbt!!!!" (oh no! stand still! keep a straight face!)

Ben looked at Todd. Kevin glanced at Emily. Austin looked up with a "whodunnit" expression on his face. Greg was sure it was Jordan and slid his desk to the side...

The students did what they so often do!
...overlook the obvious! (and today that's okay!)