The threat was said to have been delivered to multiple households along the same Chesterfield Township street.
"If I hear one explosion after 9 p.m. any days this week I will make your lives on Dove Lane insanely miserable," it read.
So, the neighbors responded accordingly: According to WJBK, they threw a block party with lots of fireworks.
The station reports that the threat may have been in response to a fireworks display on the street last year. The person who lit those fireworks told WJBK it ended before the legally permissible time of midnight last year.
Thousands of people reportedly said they were interested in Facebook event advertising the revenge party. It's unclear how many showed.
It's also still unclear who wrote the letter; Chesterfield Township Police say they're investigating.
Stay on top of Detroit news and views. Sign up for our weekly issue newsletter delivered each Wednesday.
