What is another word for flown off the handle?
Pronunciation: [flˈə͡ʊn ˈɒf ðə hˈandə͡l] (IPA) 
The phrase "flown off the handle" is commonly used to describe losing one's temper in a sudden and extreme way. However, there are several synonyms that can be used to convey the same meaning. Words such as "blow one's top," "get hot under the collar," "go ballistic," and "lose one's cool" all imply a loss of control. Other options include "explode," "erupt," "vent one's spleen," and "throw a fit." It's important to choose the right synonym depending on the context and level of intensity needed to accurately convey the message.
