I was thinking whenever you ditch in the water, your plane comes to a screeching halt. How about if you will sink. It will depend on how fast you are going, if you go fast you you plummet into the water and most likely dissintagrate.In other words, instant death. Medium speeds you will probaby hit your head on the control panel, knock you out, and drown. It other words a fast sinking. If you go slow into the water it will still sink fast but not as fast.
What I am thinking is when you hit the water a bar will appear, you must rapidly press enter fast enough to escape. Depending on the speed.
Or you can do it another way, post alternatives and your thoughts..