Examples:

• And before you fly off the handle, you may want to think about it.
• You don't have to fly off the handle like that.
• You have a tendency to fly off the handle with too little information.
• Don't fly off the handle immediately. Listen to the explanation first.
• No offense, but you can fly off the handle just like that.
• I just wanted to see if you'd fly off the handle.
• Now... if I tell you this, you promise you won't fly off the handle?
• But if I do tell you, swear not to fly off the handle.
• He has a tendency to fly off the handle.
• It's my job to fly off the handle!