Piper breaks off a wooden spoon in the car jack, the scene cuts to her sisters talking to her on the phone, and when it cuts back the spoon is no longer broken and splintered.
When Piper is trying to use the wooden spoon as a jack handle, the spoon cracks off in a diagonal splintered break, the next time you see the spoon, it is a flat break with tiny splinters on top.
Agent Fallon's hands are empty when she kills Billy but in the next shot, her hands are down at her sides and she's holding a purse.
Part of the cut on Piper's forearm isn't covered by the bandage.
When Prue first fires the Flare gun at the Wendigo the tree lights up and you can see a crew member behind the tree.
Around 10m, when they are in the kitchen, and Prue has just turned off the stove with magic, the glass reflections reveal a boom mic.
Piper is able to use her freezing power even after she is turned into a Wendigo. A Wendigo is a formerly mortal demonic creature that can transform between a human and demonic form. It is unlikely that while in her demonic form, she would have access to her powers.