Find the Mistake | Hard Picture Puzzles

It contains hard picture puzzles which will test your observation brain power. These tricky picture puzzles contain puzzle images that have one mistake in them. Your challenge is to find this mistake in each of the puzzle images.
Answers to these find-the-mistake picture puzzles are given in this puzzle video. However, there is one bonus find the mistake puzzle for which the answer is not provided. Post your answer for this "find the mistake picture puzzle" in the comments.

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