Well, I've read everything wikipedia has to offer on Nelson Mandella and a couple of things in particular caught my eye:
Whilst in prison Mandela undertook study with the University of London by correspondence through its External Programme and received the degree of Bachelor of Laws. He was subsequently nominated for the position of Chancellor of the University of London in the 1981 election, but lost to Princess Anne.
A few decades later, MK did wage a guerrilla war against the regime, especially during the 1980s, in which many civilians were killed. Mandela later admitted that the ANC, in its struggle against apartheid, also violated human rights, and has sharply criticised attempts by parts of his party to remove statements supporting this fact from the reports of the Truth and Reconciliation Commission.[10]
The latter of these two makes me wonder what exactly he got up to. Was he really the angel he's portrayed to be or was he a very naughty boy.
Someone told me that he once blew up a school. Don't know if that 100% true though