Whatchu Got There, Quirrell?
In the first Harry Potter movie, non-HP readers automatically assumed that Professor Snape was behind Harry’s terrible experiences in his freshman year at the magic school. They’d only be partially right. In the end, we all knew it was Professor Quirrell, or rather, Voldemort hiding on the back of Quirrell’s head.
The scene where Harry’s scar starts hurting right as Professor Snape looks at him would indicate that he somehow had telekinetic powers to do so. However, he’s actually wearing a worried expression, not a vengeful one. Snap immediate looks to his left where Quirrell is sitting, showing that he knew Quirrell was behind his scar pains all along.