I was wondering if you could help me with a word. I've been racking my brain for a few hours - and nothing.
So, the word I'm looking for means taking initiative, but it has to have a negative connotation. A noun, preferably, as when a person doesn't wait for approval and acts recklessly.
"You should've discussed this with someone above you because your [word] cost us money/caused problems."
Context: a conversation between a firefighter and a captain, or between a soldier and a lieutenant. The person who's being reprimanded acted on a whim, didn't ask for permission to do so, and basically jumped the gun with the intention of being a hero/lone wolf.