The lawn started at the beach and ran toward the front door for a quarter of a mile, jumping over sun-dials and brick walls and burning gardens--finally when it reached the house drifting up the side in bright vines as though from the momentum of its run. p. 6How did he think of grass as running, jumping, and drifting up a wall under its own momentum??? How did he know it would make sense to the average reader? No analysis or interpretation is required to figure out what he must have had in mind--other than "burning gardens", I haven't quite figured that part out yet. Maybe it means exposed to the sun or that it contains red and orange flowers or maybe something else, but overall I got the lawn description.
Here are some more examples from the Great Gatsby. They're all creative, descriptive, and colorful. Some of them are a bit mysterious, but, by and far, Fitzgerald's metaphors are a lot more understandable than most authors...
The windows were ajar and gleaming against the fresh grass outside that seemed to grow a little way into the house. p. 8Reference:
Her face, above a spotted dress of dark blue crêpe-de-chine, contained no facet or gleam of beauty, but there was an immediately perceptible vitality about her as if the nerves of her body were continually smouldering. p. 25
...and had made the dim enlargement of Mrs. Wilson's mother which hovered like ectoplasm on the wall." p.30
...in his blue gardens men and girls came and went like moths among whisperings and champagne and the stars. p. 39
Laughter is easier minute by minute, spilled with prodigality, tipped out at a cheerful word. p. 40
...confident girls who weave here and there among the stouter and more stable, become for a sharp, joyous moment the center of a group, ... pp. 40-41
... non-olfactory money. p.68 [I still don't get this one]
No amount of fire or freshness can challenge what a man will store up in his ghostly heart. p. 96 [ghostly?]
A universe of ineffable gaudiness spun itself out in his brain while the clock ticked on the washstand and the moon soaked with wet light his tangled clothes upon the floor. p. 99
...the rock of the world was founded securely on a fairy's wing. p. 99
...and drank nervous gayety with the cold ale. p. 118
"You look so cool." ... "You always look so cool", she repeated. ... She had told him that she loved him, and Tom Buchanan saw. He was astounded. p.119
The telephone book slipped from its nail and splashed to the floor, whereupon Jordan whispered, "Excuse me"--but this time no one laughed. p.127
So we drove on toward death through the cooling twilight. p. 136 [more of a foreshadow than a metaphor]
A new world, material without being real, where poor ghosts, breathing dreams like air, drifted fortuitously about ... like that ashen, fantastic figure gliding toward him through the amorphous trees. p. 161
F. Scott Fitzgerald. The Great Gatsby. Scribner. 1925.