Good to know before I got to the threatening to kill you part.
Guy named Angel.
Right, here's the rundown. You're in Los Angeles, 2006, which you may or may not have already known. There's supposed to be a war between Good and Evil going on. Group of higher powers, the Powers That Be and the Senior Partners, keep abducting people from different dimensions, realities, worlds, times, whatever and bringing them here. Which is probably what happened to you.
Dead moving thing? It's a vampire. Talk about irony. Stronger, faster, more evil. Usually the best idea is to avoid them. Demons, witches, aliens, you name it, we've probably got it. No, I'm not crazy. I don't know about you so don't even ask me. There's a Welcome Center at [address] if you need somewhere to stay while things sink in.