User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-5460283-20121202181839/@comment-192.26.140.217-20121204211640

I agree with you that Amatsu probably floats like that, but

1.I doubt he would absorb hydrogen(more likely just helium being absorbed), since hydrogen gas ignites easily and being in a thunderstorm he would be like a timebomb. All it would take is lighting to strike close enough to him to send an electric charge through his body. Also anything with thunder or fire element.

2.The storm that follows him is most definitely not from him absorbing the helium and hydrogen from the air, all that would happen would be that their is less helium and hydrogen in the air. (the storm thing is something that can't be explained with science, if it was possible then we would be capable of controling the weather......the storm is just a mysterious power of the elder dragons)

although he probably does absorb the water(from the storm clouds) in the air, therefore his water based attacks.