In this simulation, Forest High School students ran in panic after the first shot went off shortly after 8 am.

This simulation was done to provide crucial training to those who could find themselves in this situation in real-life.

"It could definitely happen," said Student Volunteer Courtney Saunders. "I mean it's possible to any school it could happen anywhere."

Saunders is one of the more than 100 students to volunteer in this training exercise, and she's not the only one to find it useful.

"When the bottom line comes, this is what could very well save our future hopes lives our children," said Marion County Sheriff's Office Major Jerry Craig.

Craig says Wednesday's drill will be harshly critiqued so if a real-life school shooting should occur in Marion County, he and the rest of the law enforcement officers will be ready to take action.

"So if God forbid that day ever come, they don't really know what can of worms they just opened cuz it's coming, and it's coming with a vengeance," said Craig.

Every year the S.W.A.T. Team has a drill at a school in Marion County. They switch the school though so that they can get a feel for what each school is like in a school shooting situation.