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How terrible it was you did

Like I would, devastation-mid

The city in and out a dash

Like me you're gone through in a flash,

A clap, the crowds of people banter, barter, trade all day

While in my bay.

'Devastation-mid? Surely that would mean either going to sea or being a dog!'
'This perhaps is more so for more soandsos.'

Riddle Answer A Bomb

Riddle Explanation
how terrible it was you did like I would, devastation-mid - to bomb something, to flunk or fail terribly.

the city in and out a dash like me you're gone through in a flash - to go like a bomb or to bomb through a place, to move very quickly.

a clap, the crowds of people banter, barter, trade all day while in my bay - Bombay is the second largest city in India after Calcutta, just of the Arabian Sea.