Clearly, you've never flown in the SF Bay Area in August.
Hmmm, I'm not sure how my reference to the benefits of wearing a life jacket when ditching betrays the fact that I have not flown in the SF Bay area in August, but okay, you caught me! I have not flown in the SF Bay area in August.
I have though, managed, only just, while badly injured, to inflate my life jacket, just enough to keep me afloat while waiting for rescue, after my student put me through the windshield hitting the water. It is certain that had I not actually been wearing the lifejacket as I was ejected, I would not be alive. I could not have swum, nor gone back to the sinking plane to look for something that floated. Though, it was Canada, and in July. I don't think drowning knows the difference of what body of water, and the month.