I too am very sorry to hear about your loss Sarah. It is unfortunate that a parent should have to bury their child. But while I was reading these messages it reminded me of an email that I had recieved a lil while back. A police officer sent out a message about the death of his son and what had happened. 
 
The game is called "Dusting" and what kids are doing is using a product called "Dust Off". Dust off is used to blow the dust off of the computer. Following is a few parts of the email. So while we are telling our children about the dangers of the "Choking game" please be sure to talk to them about this one.  
 
I found out that using Dust Off is being done mostly by kids ages 9 through 15. They even have a name for it. It's called dusting. A take off from the Dust Off name. It gives them a slight high for about 10 seconds. It makes them dizzy. A boy who lives down the street from us showed Kyle how to do this about a month before. Kyle showed his best friend. Told him it was cool and it couldn't hurt you. Its just compressed air. It cant hurt you. His best friend said no. Kyle was wrong. It's not just compressed air. It also contains a propellant called R2. Its a refrigerant like what is used in your refrigerator. It is a heavy gas. Heavier than air. When you
inhale it, it fills your lungs and keeps the good air, with oxygen, out. That's why you feel dizzy, buzzed. It decreases the oxygen to your brain, to your heart. Kyle was right. It cant hurt you. IT KILLS YOU. The horrible part about this is there is no warning. There is no level that kills you. It's not cumulative or an overdose; it can just go randomly, terribly wrong. Roll the dice and if your number comes up you die. ITS NOT AN OVERDOSE. Its Russian Roulette. You don't die later. Or not feel good and say I've had too much. You usually die as your breathing it in. If not you die within 2 seconds of finishing "the hit." The experts want to call this huffing. The kids don't believe its huffing. As adults we tend to lump many things together. But it doesn't fit here. And that's why its more accepted. There is no chemical reaction. no strong odor. It doesn't follow the huffing signals. Kyle complained a few days before he died of his tongue hurting. It probably did. The propellant causes frostbite. If I had only known.  
 
 
If you want to read the whole email it can be found at www.snopes.com/toxins/dustoff.asp 
 
The email and a lot of more information can be found at this website. Just wanted to inform u all on another.."unknown killer"