It does appears that the student suffers from academic stress.
Studies have shown that students who suffers from this "illness"
tend to have very violent nature. As they are unable to relieve
their stress, their character turns bad. I also suspect that the
student is from a gang. Even a student who is suffering is quite
unlikely (not totally impossible tho) to leave the class amidst
lessons.
You guys should watch Discovery Channel's show " Brat Academy".
Its a documentary thats documented in china that shows how their
parents deal with their 'brat' kids. They send their children to
special schools known as "Brat Academy", where they are trained
both mentally and physically to correct them off their bad
behaviors. Trainers in these camp believed that the problem of bad
behavior came from academic stress and social stress.
Parents nowadays have 2 or only 1 children. Hence, the kids have
no one to turn to when they are suffering from the stress to
relieve themselves, since their parents are often occupied by work.
Children in the past used to have multiple siblings, hence when one
of them faces stress, they would seek out one another to relieve
themselves. However, kids now are getting more and more stress and
have almost no possible way to relieve themselves, which can result
in behavioral problems.
