I never said you were "just panicking."
I was pointing out that what you and the blog-dude and I experience is not from the MDR.
Cataboo found our culprit: a cold water reaction that makes us gasp and panic. (and I'm not talking about a cognitive panic, I'm talking about physiological panic, the arousal that the third paper I linked said could override the effects of the MDR and cause tachycardia, etc.)
Clearly the solution is to hang out in nice warm water... with a floatie and a beer for me!
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson