A 4% window reflection fooled a man into confronting a phantom car thief

aakashgupta · x · 2026-11-08

A man in Saudi Arabia finished breakfast upstairs in a restaurant, looked down, and saw someone apparently trying to start his car. Two steps down the stairs, the 'thief' vanished — it was a reflection of a fellow diner, and the two shared a laugh.

The thread explains the optics: ordinary glass reflects 4% of incoming light. You never notice it in daylight because exterior light drowns it out, but place something dark behind the glass — like a shaded car interior, one of the darkest objects in view — and the faint mirror effect becomes vivid, the same reason kitchen windows turn into mirrors at night.

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