When Jake is giving his wedding toast, the positions of his arms change repeatedly between shots.
Jake is hit on the left side, in the following scenes the injury is on the right side of his head.
Captain Holt wears his Commendation breast bar above his World Trade Center Breast Bar. When the WTC bar is worn, it is worn above all other medals, but below the American Flag bar.
Captain Holt tells Jake he has exactly 2 minutes to share personal anecdotes about his time undercover, and his time began when he walked in, leaving Jake only 12 seconds. That would mean that 1 minute and 48 seconds had elapsed since Jake entered, but it had been exactly 1 minute flat from when Jake entered the bullpen to when he began his 12 second recap.