Is your workplace getting shot up by a crazed gunman?

No problem — just grab a pair of scissors and fight back!

That’s some of the helpful advice in a new instructional video from the Department of Homeland Security that was posted on the agency’s Web site just a month after the massacre at Sandy Hook Elementary School in Connecticut.

“If you are caught out in the open and cannot conceal yourself or take cover, you might consider trying to overpower the shooter with whatever means are available,” says the narrator in the video, which shows an office worker pulling scissors out of a desk drawer.

The video, titled “Options for Consideration,” also advises that people who get caught in an “active shooter” situation should run away, hide under a desk or take cover out of the line of fire.

The nearly four-minute-long video opens with chilling scenes from the 2007 Virginia Tech massacre, the 2009 mass shooting at Fort Hood in Texas, and the 2011 attempted assassination of Gabrielle Giffords.

But the video quickly shifts to hokey footage of office workers scampering under desks, crouching in corners and racing into closets to hide from a rampaging gunman on the loose.

“To protect your hiding place, lock the door if you can. Block the door with heavy furniture,” recommends the male narrator, speaking in measured, authoritative tones.

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