Collateral damage is a general term for unintentional deaths, injuries, or other damage inflicted incidentally on an unintended target. In my question, I'd like that to be refined further to specifically include incidences of accidental damage on one's own "side".
In the movies, there are beams & shots fired all over the place, inside and out of starships, etc. For the purpose of my presentation, I am using Star Wars examples (full disclosure: I've only seen the seven movies). I would like to use an example of the good guys or bad guys accidentally and unintentionally creating significant immediate damage due to carelessness; particularly if it resulted in death or injury.
I'm happy to accept answers from any version, but if it is in the movies, that's a bonus.