water is intentional. >> from what i heard, the passenger in the back actually pushed the stick forward to push the plane down into the water because he knew that they weren't going to make it. they would probably hit the seawall if they didn't do that. >> the concrete seawall separates the runway from the bay. slamming into it would likely be more disastrous than forcing the plane into the water. after the crash, the height of the seawall makes it difficult for the salvage crew to recover the sunken plane. >> you've got a fairly high seawall, so in order to get to retrieve the plane, you have to first bring it in close enough to shore and then you have to get the crane over to lift the plane out of the water. >> there is no physical evidence left to show that the crash ever happened. but for david darby, there is one lasting side effect. >> i don't know if i'll be flying in any little planes anytime soon. >> i just got it on film, bro. >> you got that? >> yeah. >> oh, my goodness! so far, we've seen planes crash into water and on land. you would think once a plane makes it to the runway, it would be safe.