Glad she is OK but these kinds of incidents are very few and far between. Life in general is dangerous.
Jeff is right, fortunately these incidents are rare, but since this thread has been made, I thought I would share a few additional things, since I am a firefighter/paramedic in Jacksonville.
In 21 years as a firefighter, I have only been to one person burned by a grill, gas or charcoal, thank god. What I have been to is many grills on fire from , as Chris mentioned, bad gas lines, bad valves, etc. Leaking around fittings is the most common cause
Its already been said not to relight grill for several minutes, but I want to add this.... If you ever have this happen to you, or someone else when you are around always remember what they taught us in school!!...
....STOP, DROP and ROLL!!. IF you run to get water or help you will fan the flames and make it worse. Also, if someone else is on fire, get something handy like a blanket, a shirt, and get them on the ground and smother the flames.
And although this may seem like common sense to most, I figure since we are on the subject of safety and cooking, I am going to add a bit about grease fires...
Kitchen grease fires are the number 1 cause of fire and smoke damage calls that I go to. If you ever have a grease fire, NEVER try to put it out with water or move the pan to the sink. Attempt to smother the fire with a pot lid or by covering it with flour or by using a dry chemical (common household type) ,purple k, or CO2 extinguisher. I always have one near or around where I am cooking. Immediately turn the burner or gas off.
... and please dont wait to call 911 if the fire can not be controlled. If the fire gets to cabinets, etc and you have the urge to grab a hose, please do so AFTER you call 911. A small fire can become large very quickly and you most likely will not be able to control it with a garden hose. Most kitchen fires I go to do more smoke damage (to the entire house) than flame damage.
I know, I know, this all seems rather obvious to most, but it is amazing how many grease fires I go to. I figure this is at least one subject on here I know about and can add something useful too.
Be safe everyone
(sorry for the long post)