I was in a grocery store tonight and was observing a zombie at the complete opposite side (front room with cash register and the shelves). Zombie was near front door, I was on opposite end. Watching to see if the zombie was able to pass through the shelf units, the zombie went into an attack and hit me from the complete other side of the room. It had to be 30' away.
Also, it would be nice if zombies didn't randomly hit successfully while facing the opposite direction. I mean, if we can tell it's facing toward us, we might evade the attack. If the hits just occur randomly regardless of zombie's orientation, fighting especially as a fresh spawn with no firearms is nearly impossible.