Collin removes his camera placing it on his lap, making sure it's concealed from view. Next to him LeRoy caught his eye and shook his head while telling him "No!" through clenched teeth.
At the front of room Snape pauses from writing the instructions in attempt to hear more talking, but quickly decides not to waste his time.
Collin raises the camera a look of pure determination on his face, while LeRoy sighs and sinks down in his seat. Picking up his textbook Collin drops it down on the table, Snape whips around to meet a bright flash of light.