So, we are in class right, and the teacher has a metal leg. Every year she gets the question of, "Do metal detectors beep every time you walk by them?" She heard this question to the point where she just says yes without hesitation.
Once she had said yes, two kids in the back started laughing.
Teacher: Ok alright, take it a little bit more seriously would you?
Kid: Oh, we're not laughing at that.
Kid_2: We're laughing at cancer.