The number and positions of balloons popped change after Jeffords leaves.
The lattice on the pawn shop owner's porch is not nearly sturdy enough for any grown adults to climb up to the first floor on it.
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.
Technically, the things you turn, on gas bottles, are the "valves", not the nozzles, even though it is in character for Boyle to not know that.
Rosa is surprised by the balloon arch that Captain Holt constructs, but she was present in the bar when he announced he was going to make one.
Gina says that she will not take Jake's side against the universe because the universe is, "hundreds of years old." Gina took an astronomy course in The Swedes (2015) where she learned that the universe is 13.8 billion years old.
Gina leaves the house without the rain stick and yet has it in the car with her moments later.
While attempting to sober up Rosa and Charles, Terry mispronounces "espresso" as "expresso."