damn, my friend flew 13 hours, then got massive muscle cramps in his bellymuscles, then it disappeared but reappeared as a deep vein thrombosis in the calv. then he began to cough a lot and now he is in the emergency where they said on the ct scan he has a lot of small embolisms in his lung... dang... life can throw you stones in your way... i hope he makes it. his heart is at 100bpm right now.