"Police Officer Demonstrates How to Detect Surveillance Through Two-Way Mirrors"

A police officer's TikTok video demonstrating how to detect a two-way mirror in public spaces has gone viral, amassing over 7.2 million views. By placing a finger on the mirror and checking for a gap between the finger and its reflection, viewers can determine if they are being watched. The officer later clarified the method, explaining the difference between mirror types and providing a two-step authentication process for checking mirrors. The video is intended to help people concerned about potential surveillance in hotel rooms or Airbnb accommodations, and it works for standard glass-manufactured mirrors but not for cheaper ones without a glass layer.