When Buffy is getting dressed the morning after she sleeps with Spike, she is wearing a slightly different top than she was the night before.
At the beginning when Buffy is leaving the collapsed building and Spike puts his arms around her, you can see that a cross charm from Buffy's necklace is on Spike's wrist and is not burning him.
After Dawn kicks the demon into some bins after he first attacks her and Willow, when they run away you can see the demon's arm at the left hand side of the screen. He is clearly standing still and not making any attempt to run after them. In the next shot, he is still fallen on the bins and not standing at all, then chases after them.
After Spike and Buffy wake up (04:50), you can see Spike's modesty "sock".
As Buffy is thrown to the floor by the demon, she is clearly seen to fall on blue stunt mats in the lower left corner of the screen (35:24).