The scene where Gibbs throws the football to the kids on the street is most likely an inside joke about Mark Harmon's time as the award winning quarterback for the UCLA Bruins.
Gibbs' rule no. 23: Never mess with a Marine's coffee if you want to live.
When originally aired, Gibbs tosses a long pass to the kids who are playing football. Harmon played college ball in real life. On 3/23/15, on the USA network, this had been edited to cut Mark Harmon's football pass.
This is the first time that Abby goes into the field. Her alias is Ms. Gibbs.
The syndicated version, in addition to cutting out Gibbs' perfect spiral to the kid (as mentioned elsewhere in Trivia) also cuts out a scene in Laura Rowan's kitchen. After McGee leaves, she asks Gibbs, "Is he even old enough to be an agent?" Gibbs replies, "I ask myself that, *every* day." These scenes (and others deleted for syndication) are intact in streaming versions.