another non-epileptic seizure-like event could be vasovagal syncopy

http://en.wikipedia.org/wiki/Vasovagal_response

Quite often people just go down so fast they can't even put a hand out to break their fall. Usually there is profuse sweating. It's been described as "waking up in a puddle of sweat".

Whatever the cause is, I hope your daughter does something soon. Sorry this whole thing is so awful for you and your family.