| in Did You Know Facts
Flash is a buddy of Batman, yet he does not obey his 'rule.'
![batman, flash, marvel, nemesis, bruce wayne](https://assets.shortpedia.com/uploads/2022/04/07/1649317337.webp?tr=w-1200,h-600,cm-pad_resize,bg-F3F3F3)
Batman's 'one rule' is that he never kills his adversaries.' It is not always followed by Flash. Reverse Flash, his arch-nemesis, once attempted to murder his would-be wife, Fiona Webb. Barry became infuriated and accidentally snapped his long-time adversary's neck. Notably, Flash from the future has blown up Gorilla Grodd's skull, attempted to murder his earlier self, and even killed Wally West from the future.