Leave your brain home

Rating: Null/10 (16 May 2004)

(SPOILERS- if you've been living it in a cave)
OK, now explain this to me. Eva Marie Saint tells Cary Grant to go out to this 'middle of nowhere' spot to meet the actually non-existent agent he is after who will explain everything that has been happening to him. He's let off in the middle of this endless road and waits. Nothing happens. Then he notices a crop-dusting plane buzzing away in the distance. A guy drives up, stops for a moment for a smoke and then observes that there are no crops to dust. Then he leaves and Cary, having nothing else to contemplate, keeps looking at the plane. It then starts flying toward him and he slowly realizes it is going to try to clip him with its wings. He dives to the ground to avoid it. Then the same thing happens. Then the plane suddenly starts shooting machine gun bullets at him. He runs to a cornfield, (there are crops!) where the plane tries to fertilize him to death. Then he sees a tank truck coming down the road and tries to flag the driver down who decides to run over him instead. Then the plane flies into the tank truck and they both explode while Grant manages to escape.
Questions: 1) Why does Eva send Cary there? She's working for Leo Carroll, so she must know the agent Cary is chasing doesn't exist. Is it just to protect her cover?
2) Would the bad guys really have come up with such a ridiculous method of dispensing with the hero?
3) How is the death supposed to be an 'accident', as they presumably want people to think, especially if machine gun bullets are used?
4) If the pilot has a machine gun, why doesn't he use it from the beginning?
5) Why does the pilot fly his plane into the tank truck? Was this so impossible to avoid?
The film is a lot of fun. But leave your brain home.