According to this site and some others:
Qusai Emad al-Khawalda died from lack of oxygen after swallowing his tongue during the first half of the match with Al-Jazeera in Amman, Faisaly official Ihab al-Khalili told AFP.
Is it possible to swallow your tongue, since the frenulum would prevent it from going that far? And will you really sufocate if you do it, or the muscle will become flacid as you loose concious and then someone could bring it back to position ?f