Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
that was insane
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that was insane" is correct and usable in written English.
It can be used to express astonishment or disbelief about an event or situation that was extreme or unexpected. Example: "After watching the final moments of the game, I turned to my friend and said, 'That was insane!'"
✓ Grammatically correct
News & Media
Alternative expressions(3)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
31 human-written examples
"When I got pole position in 2007, that was insane, and when I won in 2008, that was also insane.
News & Media
An old Southern family, perfect in every way, except that there was one child that was insane.
News & Media
The New Yorker, September 1, 1934 P. 41 An old Southern family, perfect in every way, except that there was one child that was insane.
News & Media
Both Mrs. Clinton and Mr. Bishop voted to give President Bush a blank check to wage a war in Iraq that was insane and stupid from the outset.
News & Media
By Thyra Samter Winslow The New Yorker, September 1, 1934 P. 41 An old Southern family, perfect in every way, except that there was one child that was insane.
News & Media
The end of Season 2 — that was insane.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
29 human-written examples
To me, that is insane.
News & Media
"To most modern architects, that's insane".
News & Media
It's the country that is insane".
News & Media
"Yeah, that's insane," he added.
News & Media
"That's insane.
News & Media
Expert writing Tips
Best practice
Use "that was insane" to express strong surprise, disbelief, or excitement about something that has just happened. It's best used in informal contexts with people you know well.
Common error
Avoid using "that was insane" in formal writing or professional presentations. Opt for more sophisticated vocabulary, such as "extraordinary", "remarkable", or "unprecedented", depending on the specific nuance you want to convey.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that was insane" functions as an exclamatory expression. It conveys a strong emotional reaction, typically astonishment, disbelief, or excitement. As seen in Ludwig, it is frequently used in response to surprising or shocking events.
Frequent in
News & Media
85%
Formal & Business
8%
Science
7%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "that was insane" is a common and grammatically correct expression used to convey strong feelings of surprise, disbelief, or excitement. According to Ludwig, it functions as an exclamatory expression, mostly used in informal contexts, but can also be found in news and media. While the phrase is acceptable, remember that it is more suited for casual conversations than formal writing. To expand your expressive range, consider alternatives like "that was unbelievable" or "that was crazy" depending on the context.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that was crazy
A more general and versatile expression of surprise or disbelief.
that was unbelievable
Highlights the difficulty in accepting the event as true.
that was incredible
Conveys a sense of wonder and amazement, rather than disbelief.
that was beyond belief
Expresses a stronger sense of incredulity than "unbelievable".
that was absurd
Expresses a higher degree of unreasonableness or ridiculousness.
that was wild
Suggests an uncontrolled, exciting and somewhat chaotic event.
that was nonsensical
Emphasizes the lack of logical sense in the situation.
that was madness
Highlights the irrationality and chaotic nature of the event.
that was outrageous
Indicates a sense of shock and offense at the extreme nature of the event.
that was something else
A more understated way of expressing that something was remarkable or unusual.
FAQs
How can I use "that was insane" in a sentence?
You can use "that was insane" to express strong feelings about something surprising or shocking that happened. For example, "The ending of that movie was insane!"
What can I say instead of "that was insane"?
You can use alternatives like "that was unbelievable", "that was crazy", or "that was incredible" depending on the context.
When is it appropriate to use the phrase "that was insane"?
It is generally appropriate to use "that was insane" in informal conversation with friends or family. It is less appropriate in formal or professional settings.
What's the difference between "that was insane" and "that was amazing"?
While both phrases express strong positive feelings, "that was insane" often implies surprise or disbelief, while "that was amazing" focuses on admiration or delight.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested