This tweet about a notice in Subway has gone viral because it’s so intriguing

Over on Twitter, people are sharing @electrapng‘s picture, taken in a branch of Subway, in the tens of thousands and we can’t blame them because, frankly, it raises more questions than it answers.

As, @electrapng asks “What happened in this dark Subway?”
Let’s face it, nobody wants their foot-long with a side of ectoplasm.
Source: @electrapng on Twitter