A large pimple on Jax's forehead keeps appearing and disappearing between scenes.
At 29:45 as Opie takes the magazine out of his Glock it's shown that there are no rounds in the mag as the follower is shown.
When Gemma is outside the church and the father asks for a cigarette, you can hear a Zippo opening with a distinctive sound, while Gemma is clearly using a black gas lighter.