At about 9 mins, when Bill touches his face and discovers that his nose is bloody, there's already blood on his thumb.
At about 13 mins, smoke is seen rising from the house chimneys. However, earlier the fireplace in the front room was shown to be a gas fireplace, so there shouldn't be any smoke from at least that one.
(at around 31 mins) When Bill is talking with Jimmy after the incident with the rat, the tip of the boom mic is visible.
(at around 1h 16 mins) When Bill gets trapped in the garage, the mic is reflected in the front windscreen.