It only takes a second to change your life forever, as these people found out when caused some rather costly mishaps. Lots of people mess up installing TVs , like one person who forgot to check for studs before installing a new flat screen . That's just the tip of the iceberg, though. From smushed car doors to demolished art pieces , these people will be thinking of that one goof-up for a long time to come. After that, help one Redditor decide their fate, as they shared this annoying message fr…