Well it's good to see you know who go, and they actually had a sincere dramatic moment there at the end.
Most importantly the .50cal I mentioned earlier made an appearance and then was promptly not used in the exact situation it would be most useful. It appears we get to see a grenade launcher used in the next episode, which begs the question of where the he'll it's been all season.
Also, the whole clown car full of zombies thing is a stupid tactic. There are few things I can think of that would be easier to counter than a group of tightly packed zombies thrown into a battle via semi and fully automatic rifles. Maybe if you had hundreds, but not in any of the numbers we have seen.