It seems like someone tried to kill Ahmadinejad by throwing a grenade at him.
http://edition.cnn.com/2010/WORLD/me...id=llBGVXh8UNV
As much as I would personally wish that this guy died, the rise of tensions would be unpredictable. Iran would probably blame the USA or Israel and the result could be dangerous like a 2nd Sarajevo 1914.