Literally everything I build that comes "assembly required" I do it twice because I've put something on backwards or used the wrong part, or the wrong screw. I once put a crib together, it looked great and I was so proud that I put it together in one try.
Plot twist: Couldn't get it through the nursery doorway and had to take it apart and put it back together.
Plot twist: Couldn't get it through the nursery doorway and had to take it apart and put it back together.