Over the past few months my 13 year old has very occasionally crumpled top the floor, almost in a faint. He seems to brush it off and we were only aware of the first couple as one time his brother and sister witnessed it and the other he was holding a glass that shattered. He then appeared fine for several months but last night I witnessed it myself - he seemed to crumple to the floor and appear almost drunk for a few seconds. He then got up and asked me the question he had already asked and I had answered before, almost like he didnt remember, He brushed it off that he was fine but I am trying to work out what could possibly be causing this? Has anyone had experience of similar?