Roman Pirozek Jr. was in Dreier-Offerman Park — also known as Calvert Vaux Park — in Gravesend, Brooklyn when his remote-controlled helicopted sliced his head and throat Thursday.

A 19-year-old toy-helicopter enthusiast was killed Thursday in Brooklyn when his remote-control whirlybird plummeted from the sky and its rotor blades slashed his head and throat, cops said.

Roman Pirozek Jr. of Queens was apparently attempting an elaborate daredevil stunt when the trick went haywire and the copter hit him, police said.

The freak accident happened about 3:40 p.m. in a ballfield in Calvert Vaux Park on Shore Parkway and Bay 44th St. in Gravesend — a hot spot for model-helicopter hobbyists.

At least four witnesses watched in horror as the helicopter’s 2-feet-long carbon-fiber blades slammed into Pirozek, shearing off pieces of his scalp and slicing his neck, cops said.

Police said Pirozek — a 2012 graduate of the High School for Construction Trades, Engineering and Architecture in Queens — died at the scene almost instantly.

A first responder said there was nothing that could be done.

“The major vessels in his neck were involved and he just bled out very quickly,” he said.

Pirozek’s toy helicopter, measuring 3 feet by 1 foot, and estimated to cost up to $1,700, was found crumpled on the ground about 20 feet from his body .

The teen’s heartbroken father, Roman Pirozek, came to the park, but was taken away by police.

“He was the best brother. He had the biggest heart,” Pirozek’s younger sister, Amy, said.

Amy Pirozek said her brother, who recently quit his job as a cargo handler at JFK Airport to pursue a career as an operational engineer, went to the park alone to fly his helicopter.

“He always protected me,” she said. “He was a good brother. He was the best.”

A man who heard of the accident and rushed to the park, said Pirozek was vice president of the Seaview Rotary Wing Club, an organization for remote-control helicopter buffs.

Kenny Marchisella, 62, a neighbor of Pirozek’s in Woodhaven, said he saw the teen heading out about 11 a.m.

“He was putting the helicopter together in the back of his station wagon,” said Marchisella. “He turned around and waved. I waved back. I was gonna say, ‘Have fun flying the helicopter,’ but I was too far away.”

Family friend Dino Spadaccini said Pirozek shared a passion for flying model helicopters with his father.

“He was like a brother and a son to me,” Spadaccini said. “He flew with me as a teen. It’s just an unfortunate event that someone so young, so full of life, enjoying something is gone.”

On his Facebook page and Twitter account, Pirozek featured numerous photos and videos showing him flying model helicopters.

“Great day for flying, the new frame brace is working great, breaking in some new packs I just got,” Pirozek posted on Facebook on Aug. 25.

Friends took to Facebook Thursday to mourn Pirozek.

“I’m without words right now,” Ben Storick posted. “I can’t believe this happened. Roman Pirozek Jr., you will always be with us.”

source: http://www.nydailynews.com