"The message we want kids to get is: Besides impaired driving, distracted driving is also dangerous," said Iris Koonan, a student assistance counselor.
Each year, city firefighters, police, EMS and other responders show the students the consequences of drunk driving.
Tuesday morning's "crash," however, occurred when youngsters on the way to their prom looked up to take a selfie and crashed into another car.
One of the high school "victims" was thrown through the windshield. Heavy-duty equipment was needed to cut the others from the wreckage.
AirMed One -- the chopper from Hackensack University Medical Center -- then flew in to collect the injured.
"The importance of the drill gives the senior class a real-world experience what can happen," Hackensack Fire Capt. Justin Derevyanik said.
It shows students, he said, that "certain actions can affect the rest of their lives and the lives of others."
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