I have unfortunately witnessed a similar misadventure on a moose hunt here in the US. I was along as a helper to the Guide who is a friend of mine. Nervous client shoots a nice bull that runs for heavy cover and water on the other side of a bay. Now, overly excited client stops listening and runs along the bank and fires a second and third shot despite myself and the guide urging him to stop and slow down. Now, really super excited client runs and stumbles upon the first bull in the grass while trying to approach what he thinks is his bull he anchored in the cover with his follow-up shots. The second bull, in the cover, is a little guy - not even close to the same animal as the first one. My biggest concern at the time was that my friend was having trouble not putting a serious beat down on the super excited, uncooperative, now indignant client (hey buddy, it's not my fault). It's been a while but, we've often wondered if the second and third shots were nerves or stupidity or bravado or what. People can do strange things.