INDIANAPOLIS -- A deadly game known as the choking game is becoming increasing popular with young people.

The game is also known as "space monkey," "flat-lining," and "the tingling game."

Kids play the game for the rush. They get a high without alcohol or drugs by cutting off their air supply.

Sometimes, kids pass out and never wake up, Staying Healthy's Stacia Matthews reported.

Students typically learn the Heimlich maneuver in school. But, that life-saving technique can also take a life if done improperly.

Children playing the game are using it to deliberately cut off their air supply.

The game is especially popular among middle school kids. First, they cut off oxygen to their brain. Then, they release the choke for the rush of when the blood flows back to the brain.

The kids think it's a cheap and safe high and it is easy to find the tools -- belts, ropes, and even bare hands around their necks.

Dr. Mike Wilham, of St. Vincent Children's Hospital, knows firsthand what the game looks like. He's treated kids who were lucky enough to survive and make it to the emergency room.

"Make no mistake about it, this game is very dangerous," Wilham said. "Children get scared because they passed out or were unable to wake up quickly. Sometimes, they receive injuries from secondary falls such as lacerations to the scalp, injuries to the face and hand, sprains to the wrist."

Over time, the game can lead to brain damage or a stroke.

Parents should watch for children keeping ropes or plastic bags, marks on or around a child's neck and chest, bloodshot eyes and headaches.