Call it a flier drill.

Bracing for impact might seem pointless during a catastrophic plane crash, but a scary simulation shows why assuming the proper collision position could mean the difference between life or death. The frightening — and graphic — PSA has amassed over 43 million views.

In the nail-biting video PSA, influencer Zack D films explained that, contrary to popular belief, curling into a ball is not the best impact pose.

“If you’re on a plane that’s crashing most people think they should brace by curling into a ball,” the influencer said. “But that’s not actually what you should do.”

Zack D, who frequently recounts notorious freak accidents for his over 23 million Youtube subscribers, instead instructed flyers to “assume the brace position by leaning forward and covering your head.”

“This position helps protect your vital organs and reduces the risk of head and neck injuries,” the content creator assured viewers. “By leaning forward, you also minimize the impact force on your spine, increasing your chances of survival during high-impact situations.”

Accompanying animated footage juxtaposes a passenger’s incorrect curling posture with another passenger adopting the correct crash pose as a plane is going down.

The latter emerges unscathed despite getting buffeted by dozens of luggage article while his counterpart gets flung up to the cabin ceiling, before falling and breaking his spine on the armrest.

Commenters were shocked over the disturbing simulation with one aghast viewer writing, “Bro showed no mercy to the guy at the end.”

“The poor guy got all the luggage flying at him,” said another.

A third found it slightly implausible that one flyer survived an apocalyptic baggage onslaught while the other guy was killed in one hit.

Despite the extreme nature of the simulation, experts agree that bracing correctly is crucial. Nick Eades, a former British Airways captain who is considered the world’s most experienced Boeing 747 pilot, told LADbible that it can prevent passengers “breaking their necks in a big impact.

“You’re just trying to get the body into a position that’s going to suffer the least damage,” said the veteran flyboy, who has flown the 747 for nearly 35 years. “It’s like whiplash — you’re trying to avoid that sudden movement of the head, which can result in serious injury, if not death.”

Afraid that you might forget the proper bracing position in the heat of a crash? Not to fear.

While flight attendants generally omit this tidbit from safety demonstration to avoid causing alarm, the instructions are printed on aircraft safety cards, Reader’s Digest reported.

Not to mention that crew members will instruct flyers on the proper protocol in the event of a worst case scenario.

“Should an emergency occur where passengers will need to brace for impact, the flight attendants will be very clear in giving instructions on what to do and how to do it,” said Dan Bubb, PhD, a former pilot and current aviation safety expert.

Of course, proper bracing posture isn’t the only factor when it comes to increasing the odds of surviving a plane crash.

Aviation safety specialist Christine Negroni advised passengers to wear loose-fitting clothing in lieu of leggings, which cut off circulation and have the potential to melt and cause burns during a collision-induced blaze.

Meanwhile, contrary to popular belief, there is no magic safest seat during a plane crash. While those seated in the back are generally safer during nose-first collisions, there are plenty of other variables that factor into survival, including how quickly a fire spreads or whether passengers can access an exit.

Over the summer, demand for the “lucky” seat 11A skyrocketed after a passenger sitting in said air chair was the only one to miraculously survive the notorious Air India crash in June.

However, experts chalked his survival up to the seat’s proximity to an emergency exit rather than any inherent safety advantages.