so many mistakes in the movie

Rating: 7/10 (1 July 2005)

i loved the movie very entertaining but there were so many mistakes like when they were in the basement at there moms and every thing outside was destroyed THERE CAR WAS STILL THERE IN PERFECT CONDITION. and WHAT WAS killing the aliens? and when the first robots came the was a guy with a camera taking pictures and there was a guy with a video camera how could those have worked if there was no power? why were they spraying blood every where why did the aliens do that? and what were the birds doing? a lot of unanswered questions I have someone please answer me the movie was good and entertaining though. I really liked it the CGI was amazing