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It's a Sign!

 On my way home I noticed the passengers of the taxicab to my right signing.

What precise timing I thought to myself.

So many times in the past I’ve observed passengers inside taxicabs.

Only now I chance upon deaf passengers signing.

I am quite sure they were deaf because their manner of signing was very swift. 

Deaf people sign as fast as the speed of light.

I took it as a sign.

No special meaning, just a good sign for myself.