[ninty]

I've seen the movie four times.

Watch it at the end when the people are talking on TV.

They talk about a middle east ritual. Nothing about water. I'm sure the middle east ritual isn't spraying water on aliens. Think about t for a minute.

How do you know that the water is FATAL? You don't. The alien got hit in the head ans stomach with a baseball bat numerous times. Water can just add to the beating. There is proof that water hurts them, but no proof it is fatal to them. It could have been the massive blows or the water that actually kills the alien. And actually we don't even see him die. hes lying there breathing heavy...so.