For years, paceños living nearby claimed they sometimes heard the statue cry, but also that some of the bad things which happened at the time were its vengeance for being taken away from Tiwanaku. Some unusual events, such as floodings in areas normally not affected by such catastrophes, were put down to the 'vindictive temper' of the monolith. The last of this series of events took place in February 2002: torrential rains fell on La Paz and El Alto where dozens of people died and incredible damages were caused. The most badly affected area, some say, was at the end of the street which spread in front of the monolith's gaze. It was time for the statue to be taken to the home it should never have left. Consequently, a copy was made and put in its stead in front of the stadium.
Another reason to explain how the flood got so bad was that the city's sewer system was not so efficient and that, moreover, there was so much trash in the streets that it got clogged too quickly, hence the magnitude of the flood which would, otherwise, have not been so wrenching, this being one of the reasons why, nowadays, you can see so many people cleaning the streets in La Paz.
Sources: Marco & Bico (& the internet)