BOSTON (WHDH) -- This weekend's shooting caused the head of security at Boston University to send out a warning to students and staff. He tweeted out survival guide video in case a shooter opens fire -- and it's catching a lot of attention.

With 1,278 followers on Twitter, the head of BU Police felt the best way to circulate the video was through Twitter and Facebook. And he hopes every student and faculty member takes just a couple minutes of their time to watch the video.

Police say it may feel like another day at the office -- until it turns into a day no one will forget.

"You see real life. What's happening. This is part of real life unfortunately. We don't know where it's going to happen. That’s random acts, random people. Never know where it's going to happen. So we want to prepare for it,” said Scott Pare, Deputy Director for BU Police.

The video describes what to do if you find yourself in the middle of an active shooter event.

"Run. Hide. Fight."

Three words that Scott Pare says could save your life. He feels the video is a good lesson for students and faculty to see and learn.

"It’s all about education. The news does a good job scaring people, we're just trying to educate them," Pare said.

7News showed the video to some students.

“It’s good for people to be conscious. Those are isolated incidents, but you never know what could happen,” said Yousef Behbehnai.

“It is violent, but that’s what you’re going to expect. They show you what you’re going to deal with,” said Mohammed Morauf.

“Last year there was an incident where someone was shot but it wasn’t on campus -- but it was a student. I think it’s important because you never know what could happen,” said Shelly Echeverria.

Pare says with the shooting in Wisconsin this past weekend and the mass shooting in Colorado last month, the time for everyone to see this video is now.

"I think there's great information there. It’s real life and real situations and you can certainly put it to use at any time," said Pare.

The video was produced by the city of Houston and was funded by the Department of Homeland Security.