Terrifying video captures sudden escalator reversal that injured 18

Credit: DaytonDailyNews

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WATCH: Escalator goes crazy and shoppers tumble

Credit: DaytonDailyNews

A pair of escalator mechanics have been arrested after police say they tampered with an escalator in the Langham Place mall in the Mong Kok area of Hong Kong, causing a dangerous situation.

They were questioned after an incident in which the escalator abruptly changed directions, sending passengers plummeting to the ground floor of the mall. Eighteen were injured; one man was hospitalized in serious condition for a head wound.

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In a statement obtained by CNN, Otis Elevator Co. spokesperson Ian Fok called the arrest of its employees "a surprise." He added, "Our legal team is working with law enforcement to clarify the situation and intends to defend our mechanics."

Video obtained by the South China Morning Post shows the moment the escalator changed directions, eliciting screams from dozens of people riding at the time.

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Escalator

Credit: Severin Matusek / EyeEm

Escalator

Credit: Severin Matusek / EyeEm

Combined ShapeCaption
Escalator

Credit: Severin Matusek / EyeEm

Credit: Severin Matusek / EyeEm

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