Grammatically Correct: The writer's essential guide to punctuation ...

DRAWING ATTENTION TO A POINT
PUNCTUATION
Some writers like to underline statements that are unlikely, ironic
or unexpected by following them with an exclamation point enclosed
in parentheses.
After trying and failing to borrow money, first from his cousin, then from
his best friend and finally from the starving artist upstairs(!), he decided
there was no alternative but to sell off the private jet.
After nineteen pastries(!), Albert decided he'd had enough.
While this strategy is not illegal, it demands attention a bit too
loudly. It is occasionally appropriate, but as a general rule you are
better off wording things so that ironies or oddities speak for themselves.
(Give your readers credit for being able to pick up on
subtleties.)
CAUTIONS ABOUT THE EXCLAMATION POINT
Use this punctuation mark sparingly, or it will lose its effectiveness.
Relying on it to infuse excitement or importance into uninspired
lines will make your writing look amateurish or-even worse-gratingly
like ad copy.
It is permissible to use it in combination with other strategies for
indicating emphasis, such as capital letters, boldface or italic type,
but don't overdo this: Usually, a better approach is to use one strategy
or the other. It is also inadvisable to use multiple exclamation points
to indicate extreme astonislunent or excitement (Could you believe
what she said!! The concert was incredible!!!). Occasionally, this
may be effective in drawing the reader's attention more closely to
something, but more typically it makes it look as if you're trying too
hard.
Some writers fancy using a combination of a question mark and an
exclamation point for extra emphasis, usually following a rhetorical
question. There is in fact an obscure punctuation mark for this
purpose, called an interrobang (!),which merges the two marks
into one. More typically, one sees them presented side by side.
Could anyone have thought it possible?!
Can you believe what she's done now?!
123