Most Backseat Passengers Don't Know This Hidden Danger

Parents and their toddler riding in the backseat of a cab without seat belts were tossed like rag dolls when the car crashes. Dash cam videos posted on YouTube show other terrifying accidents around the country.

Read: Woman Charged with Vehicular Homicide For Daughter's Car Seat Death

Nowhere are the dangers of riding without a seatbelt in the back seat clearer than in one video, which showed a passenger, buckled up, while the other is not. The woman without a seat belt was smashed against the side of the car. Her friend is held safely in place.

Now, the deaths last weekend of math genius John Nash Jr. and his wife, Alicia, whose lives inspired the Oscar-winning movie A Beautiful Mind, are reminding everyone about the need to use seat belts in the backseat.

60 Minutes correspondent Bob Simon was also killed when he wasn't wearing a seat belt in a Town Car that crashed in February.

Read: '60 Minutes' Correspondent Bob Simon Killed in Car Crash

The most famous victim of all is, of course, Princess Diana, who wasn't using her seatbelt in the back of her chauffeured sedan when she was killed in 1997.

Actor Tracy Morgan suffered grievous injuries when he wasn't buckled into his limo van when it was struck by a Walmart truck last summer.

57% of taxi passengers fail to buckle up according to the NYC Taxi and Limousine Commission. 

INSIDE EDITION’s Les Trent spoke to passengers climbing out of taxis in New York City.

One said, "We didn't even think about it, we just hopped in." 

Even a simple fender bender can cause serious facial injuries to passengers who slam into the partition. Doctors even have a name for it -- "Partition Face."

Dr. John Sherman of New York Presbyterian Hospital showed us scans who suffered a serious blow to a head in a taxi accident.

He said, "Broken nose are the most common and it goes through the entire sections to go from complex injuries from the eye socket to the jaw." 

Trent asked Michael O'Loughlin of Cab Riders United told INSIDE EDITION, "Why don't people wear seat belts in cabs?"

He said, "Because they have this crazy illusion that somehow we are paying for the transportation, it is going to be safe." 

Experts hope that the deaths of the couple who inspired A Beautiful Mind, will remind everyone yet again what's at risk when they neglect to buckle up.

Laws in all states require seatbelt use in the front seat. But only 28 states require it in the backseat. To find out if your state is one of them click here.

Watch Below: Scott Pelley, Lesley Stahl, Steve Kroft React to Tragic Loss of Bob Simon