A student displays a "back-to-school essential" in case of intruders, courtesy of a new video sponsored by Sandy Hook Promise. Photo Credit: Sandy Hook Promise
A tweet from Sandy Hook Promise warning viewers about its Public Service Announcement related to school shootings. Photo Credit: Sandy Hook Promise
A total of 20 children and six educators were killed at Sandy Hook Elementary School in 2012. Photo Credit: File
The scene outside Sandy Hook Elementary School following a deadly mass shooting in 2012. Photo Credit: Jes Siart

New Video: Sandy Hook Promise Shocks Viewers With 'Practical' Back-to-School Intruder Tips

Sandy Hook Promise, a nonprofit organization "protecting children from gun violence with programs that work" aired a video on Wednesday, Sept. 18 aimed at drawing attention to mass shootings -- including the one at Sandy Hook Elementary School in Newtown.

It's titled "Back-to-School Essentials." The Public Service Announcement is graphic and may be disturbing for many viewers. It can be accessed by clicking here. 

The Sandy Hook shooting occurred on Dec. 14, 2012, when 20-year-old Adam Lanza shot and killed 26 people, including 20 children between six and seven years old, and six adult staff members.

"These new sneakers are just what I needed for the new year," a student running from a shooter says in the PSA.

"These new socks? They can be a real lifesaver," another student says as she uses them for a tourniquet on a classmate wounded by a bullet. Then, a boy uses his new skateboard to smash a classroom window to escape. The video ends with a girl crying in the bathroom while texting her mother that she loves her before the door opens and footsteps are heard.

"I finally got my own phone to stay in touch with my mom,'' the girl says.

The PSA is the latest part of Sandy Hook Promise's "Know the Signs" campaign designed to educate students, teachers and parents about seeing the signs of a potential school shooter and intervening before it's too late.

For more details about, click here.