Comic books at their core have always been about the unending struggle between good and evil, hero versus villain, how far someone will go to protect their loved ones, or sometimes the whole universe.
Not all characters across the world of comics conform to these ideas of right and wrong with some often finding themselves somewhere in the middle. Anti-heroes and otherwise sympathetic villains have become increasingly popular, not just in DC and Marvel, but across the whole landscape of comic books.
Despite an increase in the morally ambiguous category of "heroes" there has always been a hunger for what-if scenarios regarding those heroes who hold themselves to a higher standard. Countless times have creators pulled the old "what if Superman bad" in an attempt to shock audiences by having their favourite boy scout tear the DC universe in two.
But some writers took that idea one step further, what if those who perceived themselves as heroes were to turn over to the dark side without even realising it.
Delving deep into comics past and present, here are some of the most shocking moments when characters realised they were the villain.