The train reaches the end of the tracks and drives straight off 'em. Uh oh.
Conveniently, there's an ocean with a ship in it waiting below. The train lands on the ship, naturally.
None of this looks very safe to us.
And… we're right. This is all highly unsafe. The boat captain, the train conductor, the passengers, the mouse, the fox, the goat, and the big guy are all plunged right into the sea.
Sam is still in the air, with his platter right up in the big guy's face.