Here are some good simile for something that falls fast:
Tears fall fast as rains from heaven.
The rain falls fast like a jaguar, running up the mountains.
The fast moving waterfall is like a stampede rushing to get to safety.
A figure of speech is a departure from the ordinary form of expression. It is employed to produce a greater effect.
There are four different kinds of figures of speech.
1. Those based on resemblance
Examples are: simile, metaphor, personification and apostrophe
2. Those based on contrast
Examples are: antithesis and epigram
3. Those based on association
Examples are: metonymy and synecdoche
4. Those depending on the construction of the plot
Examples are: climax and anticlimax
A simile is a figure of speech that makes a comparison, showing similarities between two different things. Unlike a metaphor, a simile draws resemblance with the help of the words “like” or “as”. Therefore, it is a direct comparison.
To learn more about the four different kinds of figures of speech, visit EnglishGrammar.org.