I think Will Smith just gets better and better. I was a bit confused on the whole human zombie thing. I did read (on this thread?) that they were supposed to be vampires in the book, which would have made a lot more sense. If they exhibit no human traits anymore (as he stated while doing the exam on the female he caught) how did that one who was all pissed set a trap and put Fred near the museum? Also what the heck was with the super human strength, and the one who was throwing him(Smith) around with it's mouth? Does a mutated virus turn us all into dark seekers who then gain super-human jumping powers?
It was good, I hid in my jacket part of the time.
The Sam part made me sad. Poor puppy!
Overall it was good, but I like the twist that someone suggested about there not being a survivor's colony. That would have been good.
ETA: My husband was pissed about the grenade issue, he said, "Grenades do not blow up like that, they are not incendiary devices. What kills you is the schrapnel."