When Luke is on Dagobah when he is being trained and doing a hand stand for the first time, his X-wing can be seen exactly how it looked when it first crashed laned about ¾ above water, then in basically the next shot its just about completely underwater
Then when the heroes are leaving bespin in the millenium falcon when they first notice the super star destroyer the ship takes a hard right and the stars seemingly get brighter
Finally, directly after that shot the Falcon seems to be drifting aimlessly in space (in relation to the stars) as they attempt to make the jump for hyperspace