Continuity mistake: The bullet holes in the victim when he is in autopsy are different to when he was shot. (00:03:00 - 00:10:50)
Continuity mistake: 6.17 - South by Southwest. The first time Tony is talking on the phone to London about his uncle's estate, he is alternately either talking on his cellphone or office phone throughout the conversation. (00:06:15)
Continuity mistake: When looking at the playboy magazine at the start, the pages change between shots. (00:01:50)
Continuity mistake: When Gibbs asks the kid where he got the gun, he has a notepad in his hand. Camera cuts and it's now a pen. (00:05:25)
Continuity mistake: The second time we see McGee bidding on clubs there is 1m 24s remaining. 3 seconds later he closes the window when Gibbs walks in, and there is 1m 24s still left. (00:21:00)
Continuity mistake: When Gibbs is on the phone with DiNizzo, Tony's phone jumps from his right hand/ear to his left between shots. (00:05:35)
Continuity mistake: When Tony shows Chandler's boarding pass to McGee for photo evidence, Tony's hand moves from holding the upper edge to the lower edge. (00:04:15)
Chosen answer: "Policing your brass", means to pick up your expended shell casings, after firing your rifle, or pistol.
pross79