Delivering a baby on the side of the road is unusual, but certainly not unheard of. However, Long Island woman Siobhan Anderson doubled down on shock value when she gave birth to twins over the weekend on two different highways.

Siobhan was due to give birth to her boys next Friday. But on Saturday, at about 5:30 a.m., her water broke, ABC news reports, and she and her husband Bryan headed straight to the hospital.

They weren't far from home when Siobhan started having contractions and even felt the first baby's head. "She kept screaming, 'The babies are coming ... "I was like, 'I think we have time to at least get to the hospital,'" Bryan told ABC News.

But, no such luck. The couple pulled over and called 911. Thankfully, EMTs arrived on the scene in time to deliver. Baby boy Gavin John was born on a stretcher right on the side of the Southern State Parkway, the AP reports.

According to ABC News, the EMTs decided everyone should proceed to the closest hospital for Gavin's brother to be born. But ten minutes into the drive, it happened again. The group pulled over and Siobhan had her second baby, Declan Michael, on the highway. The only difference this time was that they'd gotten off the Southern State and were now on the Wantagh State Parkway, the AP reports.

Two babies born on two highways, to one mom on one day.

"I'm still in shock that it happened. I can't believe I was able to do that," Siobhan, who was planning to have an epidural, told ABC News. Mom and both babies are doing well and plan to go home Friday.

It's a tight race for the most remarkable highway birth story -- Siobhan's experience is unique, but she faces tough competition from Amanda McBride, the Minnesota mom who delivered her own baby while driving herself to the hospital. Read McBride's story below, and find out about more of the craziest birthplaces we've heard of... yet.

Earlier on HuffPost:

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  • In A Tree

    In 2000, Sofia Pedro <a href="" target="_hplink">climbed a tree</a> to escape the floodwaters in Mozambique, Africa. The brave mom held onto branches as she delivered her baby Rosita. A few minutes later, they were rescued by a South African helicopter crew, umbilical cord still attached.

  • At McDonald's

    In 2007, McDonald's employee Danille Miller -- who didn't know she was pregnant -- felt a sudden urge to run to the bathroom during her shift. A few minutes later, she <a href="" target="_hplink">gave birth to baby Austin</a>. Sources were unable to confirm if she changed her greeting to, "Would you like a baby with that burger?"

  • In A Library

    Dominique Trevino was on the way to the hospital by bus in 2009 when she started <a href="" target="_hplink">having contractions</a>. Another passenger, who worked at the hospital, told her to get off at the library. Once inside, library security pitched in to help deliver her baby girl. She only had to push twice.

  • At A Post Office

    Sonia Marina Nascimento stopped by a <a href="" target="_hplink">post office in England</a> to buy a mobile phone credit -- but got more than just a top up: she went into labor and gave birth to a baby girl right there. The post-master, who put the baby on the scales (and handled her with care?), said she weighed "the equivalent of an £8.22 first class parcel."

  • On A Sidewalk

    In 2009, Tiffany Kohls gave birth a few <a href="" target="_hplink">feet away from a hospital</a> in Wisconsin. She said there was no stopping her son Kellen's arrival. Security guards and a nurse helped delivered him.

  • In A Car (That She Was Driving)

    In 2010, Amanda McBride felt like she was <a href="" target="_hplink">going into labor</a>, so she picked up her husband -- who suffers from seizures -- and headed towards the hospital. While en route, her water broke and her husband took the wheel. "And then, all of a sudden, I heard this little waa-a-a-a (cry)," he said.

  • On A Highway Shoulder

    A New Jersey couple was on their way to the hospital when mom Alshesirca started having contractions on the <a href="" target="_hplink">Garden State Parkway</a>. Dad-to-be Nelson pulled over and delivered his baby on the side of the road with a 911 operator guiding him. "I was just glad we were driving our truck and not our Civic," said mom.

  • At 40,000 Feet

    In September, Aida Alamillo was <a href="" target="_hplink">flying from Manila to San Francisco</a> when she went into pre-term labor. Three nurses on board and cabin crew members helped deliver baby Kevin Raymar Francis Domingo --"Francis" because they were en route to San Francisco.

  • On The Internet

    OK, so she was technically at home, but Nancy Salgueiro set up a high-definition video camera in her living room in Canada to <a href="" target="_hplink">livestream the birth of her son</a>. More than 2,000 people registered to watch online. Her two-year-old son cut the umbilical cord.

  • In An Art Gallery

    Performance artist Marni Kotak <a href="" target="_hplink">made headlines</a> earlier this year when she announced her plans to give birth inside a New York art gallery because it is the "highest form of art." With approximately 20 people in the room, she delivered baby Ajax in late October. Footage of the birth will be added to an upcoming exhibition at the Microscope Gallery in Brooklyn.