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Here’s 10 mistakes in Home Improvement you probably never noticed, such as: Wilson's accidental face reveal; Tim Allen breaking character; and several times crewman were caught on camera. Enjoy!

Time Stamps:

00:00 - Wilson’s Face Revealed
00:20 - Special Effects Revealed
00:53 - Reaction Mistakes
1:44 - Set Reveals
2:20 - Crew Caught on Camera
2:46 - Nail Gun Salute Secret