It went something like this: Opponents, fearful that Chavez's stacking of the election committee and courts means he will continue to move the country towards a Cuban style communist state, demonstrated for reforms before the next election.
Supporters started throwing rocks and beating with sticks.
Cops stood by.
Chavez is a thug with a lot of power accumulated around him, so the opposition has a long way to go; probably too far.
Photo and source: Reuters