Sudden nausea and ping out?

Ok so last nite a good friend of mine was sitting at the picnic table with a few friends and myself everything was fine joking and having fun, when all of a sudden she says she doesn't feel so well. She got up and walked over by a tree to attempt to vomit but didn't make it 10 steps when I hear a loud thud as here head bounced off the ground. I am thinking and hoping it was low bloodsugar but would like someone opinions. It had been a long day we woke up at 6:30am to drive 2 hrs to meet up with some friends at the river. Spent 2 hrs on the river drinking and sitting in the sun. She was abit intoxicated but nothing out of hand and nothing she hasnt done before, had a 10 in sub for lunch and some pringles. Drink wise it was mostly beer but alittle bit of handgrenades which have everclear in them but she only did 3 shots total of that, She said she had been feeling fine all day we get back to our campsite and start to wind down abit I cook us some dinner around 7...Filet Mignons, bakes potatoes, and sweet corn on the cob. She had another 5-6 beers thru the course of the evening then stop drinking. She had a hotdog and sat by fire for about 2 hrs after she stopped drinking then the above mentioned happened out of no where scared the living hell out of me. I rushed over she wasn't responding for bout 30 seconds once she came around she was out of it didn't really know what happened. I checked eyes and they were each dialating equally, so after bout 5 min we sat her up got her a granola bar and a gatorade for sugar and electrolytes and she seemed ok but she said she still just wasnt feeling right. Sorry for lengthy story here but im concerned and wanna makes sure i give you all as many details as possible. Does this sound like low bloodsgar or could it possibly be something else. I told her to go see the doctor tomorrow but with her job, her kid, and how stubborn she can be I don't know if she will and just abit worried any feedback would be great.