Can anyone help me??? (Anywhere)

Does anyone know the name of the movie where people died or exploded because they drank the water? I think there was a court scene where the judge drink the water and exploded or die and in the town scare people drank the water and they started to die or explode. And then at the end the two main characters jump out a window to theres deaths because there was no way to escape. 

can someone help me please!!!