If you want an extreme karma imbalance you do something stupid like that. Especially if the act was malicious. Otherwise just use the butterfly effect and make sure the end cause is just a simple misunderstanding. In the end you can generate ALOT of GOOD KARMA by just using a rubegoldberg machine to keep people away from accidents and their own mistakes. I use laughter and education personally it helps avoid any traumas that some idiots think need directly faced to be understood. Frankly I don't trust anyone that tries to cross that boundary.