LOL, that certainly is not the simplest explanation!
The simplest explanation is that he shoves the stick forward, puts the plane into a dive, and plants it in the water.
I am not sure about anything so I will speculate also, and say, however it got into the water, I tend to think that is exactly where it is too. I find it hard to imagine it could have landed somewhere. Cell phones with video cams are everywhere, so how many people would have to be quiet, to keep it a secret, no matter how remote it might be? A secret is not a secret, if more than one person knows about it. Big conspiracies tend to unravel when someone talks. The government, with all their sophisticated electronics, may have an idea, but may be keeping quiet about it. Who knows for sure. We might never know the truth.