[Tharkun]

I doubt it triggers the "drowning reflex", which according to Wikipedia looks like this:

"Involuntary actions operated by the autonomic nervous system involve lateral flapping or paddling with the arms to press them down into the water in the effort to raise the mouth long enough to breathe, and tilting the head back. As an instinctive reaction, this is not consciously mediated nor under conscious control."

You may be referring to the diving reflex instead?

[drjannakoretz]

Yes, many apologies, I mistyped. I will correct now.