Very confused

Rating: Null/10 (1 July 2005)

Just saw the movie. Disappointed like the rest of you who saw it, but I have a question for the ones who did see it. How did the Aliens lose their force field around their ships? and why did the tripods start acting crazy and falling over? I didn't understand how all of a sudden they began to die and fall over. Is it because they were drinking the water? Can someone clear this up for me, because I was terribly disappointed in the ending.
All in all though, I thought the movie had great potential. Tom Cruise was very good and I did enjoy watching the movie up until the end where it seemed the just cut it short and didn't really explain anything. Usually I really enjoy Spielberg's films but this one was nowhere near what he usually produces. Some of the things I really enjoyed was how it jumped right into the action, but then again that took a bit away from the plot.