I want to learn but unfortunately I can't .....

This is quite a realistic kind of story. Once there was a boy,Ahmed in my class. He asked the Mechanic's teacher a question related to vectors and he really need to go the bathroom but he preffered to hold that for a while , as he thought what longer would that took him to keep that liquidy devil inside, but he was totally unaware of what was happening to him next. So when Sir was about to answer there was a knock on the door and a person with a really weird and huge moustache and bald head. The moustaches was so hairy that it kind of seemed as if his all body's hair has grown below his nose. One more thing about him was that when he talks he spit out saliva so you can all feel the rain over the first row students. Also he used to take a long gap when he talks. Ahmed was really angry at the moment and all he was thinking about at the moment was to somehow speed up the person or shut his mouth up but the good thing was he somehow hold up his rage and show patience which was the most difficult thing for him to do at the moment. He was there to make an announcement about not throwing garbage in the ground, but when I looked around I noticed that nobody was listening infact everyone has a grin over their faces and they were making fun of his moustache while whispering which was their right to do. So when he finished his announcement cum entertaining he left the class. The teacher than asked, ''so where were we?'' and when Ahmed was about to remind him about his question another student asked for Sir's permission to the washroom and of-course his permission for the bathroom was more important than Ahmed's question to be answered otherwise their could be rain again but not of saliva this time. Ahmed felt his mouth kind of watery after listening the word bathroom. So the student left the class holding his thingy which showed that he was on hold for long time. During all this time Ahmed was the most desperate one and his face was now turning red and he seems like as he is now less interested in the answer and more interested to ask the teacher for permission to go the relaxation room which was much needed at the moment. So when teacher asked again paid attention back to class, another student, Idrees asked a question related to velocity of a moving car which was of more explanation. The teacher started explaining to him and it took him about 10 minutes to make Idrees clarify his concepts, also he was asking some other questions during the whole session which were totally irrelevant but somehow this was the day for all this to happen. The teacher then returned towards Ahmed and said ''I still remember your question and it's not that I would not answer you but it was just a lot of disturbance was in between so anyways....'' excuse me Sir, suddenly someone from the back benchers asked Sir about the exam date, while Sir was replying him Ahmed felt a very uncomfortable layer of feeling running through his body which made him almost cried but he somehow control himself. He was now zero percent interested in knowing about his question's answer and he was waiting for the class to over as soon as possible but that was the last thing seem to be happening for now. He was now in a terrible state and was regretting the moment he drank the whole cola drink before class. In his heart he kind of pledged that this was the very last time he had that cola and he would never touch cola bottle again ever which to be very obvious the biggest lie at the moment. He was waiting for a chance so he can somehow get out of the class. when he was not able to think of something and he also knew that the class time is still much. So he started to think to do something so he can be out of the class. He started to make weird shriek voices in the class and everybody including Sir was staring him in a shocking state. He noticed that now every fellow is laughing at me instead of stop making those sounds he focused on volume that up and speeding up them as well. The teacher asked him about his behavior he was very embarrassed and he apologized for that but then at a sudden he spit out all what he was feeling at the moment and also he told his teacher that no matter how good you explain the vectors thing, he would not be able to understand a single word because of this very emergency state he is in right now and then he asked the teacher for the permission to go to the bathroom and request him to answer his question when he got back to classroom after taking out his very waste material in the liquid form he has been holding seemed like since forever. So he went to the washroom running out of the class holding his thingy in the same way as that of the last student doing that and he got to the bathroom which was for him kind of spa for him or even more than that and after 10 minutes he was back in the class noticing the fellows with grinning faces and teacher with a weird look at his face. Everyone eye's was at his lower zippy part which when he followed the gaze of his fellows he came to know that his thingy was out of it's area and he forgot to close his zip. He with very much embarrassment closed his and got back to his seat. After settling down of Ahmed the first thing his teacher did was that he answered his question and clarified his concepts.