What Douglas had not expected was that quite a few Slytherins' Boggarts had turned into Professor Snape.
He had thought Gryffindor would have the most.
Clearly, Snape was also very strict with the Slytherins in everyday life.
Since he did not particularly want to show off, Harry had always told everyone that he had encountered an enormous snake with glowing red eyes.
Some Slytherin students were delighted to hear this, and even began plotting when to produce another snake to frighten Harry.
Because in Potions Class, those Slytherins whose Boggarts had turned into Professor Snape, and who had gone around telling everyone about it, received treatment every bit as bad as Neville's.
Whether or not they had good Potions grades, Professor Snape punished them all by making them learn to chop vegetables... prepare potion ingredients with Harry.
This might have been Harry's only chance to openly manage Slytherin students in Potions Class.
Although he endured all sorts of cutting remarks and unfair treatment from Snape, he turned around and targeted the Slytherins who were also practicing potion preparation.
"Goyle, it seems that following your young master Malfoy around every day hasn't taught you the difference between dicing and chopping into chunks. Cut it all again!"
"What are you staring at? Shall I ask Professor Snape to come and have a look?"
After class, Harry kept telling Ron and Hermione how wonderful it had felt.
Compared with the entertaining practical lessons for the lower years, the fourth and fifth years had a rather painful time.
When Douglas walked into the classroom with their test papers in the second week, they felt the temperature in the room drop several degrees.
"Look at the answers you gave! Most of you only did the multiple-choice and true-or-false questions. You didn't answer a single written