Special students

They studied with us . 
German.
They paid no fees..simply sauntered into class at will. We protested, teachers did too, but to no avail.
They just needed open doors. That's all. 
Last year a dark guy used to attend class. He would rush in like wind, find the spot closest to the teacher and snooze away to oblivion. He never answered a single question.
But he knew all...(having attended these lectures umpteen times in the past).
We hated him..some feared for their lives. Sometimes Ma'am couldn't concentrate. So somebody would rise up with biscuits in hand and bribe the shabby fellow out through the same door he came in.
He has numerous cousins, mostly students. When I did my first year, a very fair but extremely unwashed fellow, a consistent latecomer would dash in, curl into a sleeping position and sleep throughout. The instant Ma'am finished, he would run out at top speed.
These guys are well qualified. They start from basic level.. some go on to complete their Phds.
As a rule, they need not give exams.
But an ambitious guy appeared in our class this year to write his finals. Obviously people next to him couldn't concentrate. He wouldn't understand " GO." 
Finally a girl summoned up enough courage and went to the front of the class..
"You..you..you..you"..she whispered beseechingly, desperately to the fellow. Loud enough for us to hear.
He slowly rose up, ran down the steps..and simply stood in front of her..and stared.
He stared..and stared. 
We paused holding our breath. We stared. 
Finally this crazy dog decided to call it a day.
He fled.