sentences:  One climactic scene in the film portrays both the positive and negative effects of voyeurism.Driven by curiosity and incessant watching, with Jeff watching from his window, Lisa sneaks into Thorwald's second-floor apartment, looking for clues, and is apprehended by him.Jeff is in obvious anxiety and is overcome with panic as he sees Thorwald walk into the apartment and notice the irregular placement of the purse on the bed.