When Tony and McGee go to arrest the sergeant,they show him a video on their cellphone, it's dark and black and white.a few seconds later,you can see the screen of the phone again and now it's all bright and colorful,looks like grass and blue sky only.
When Abby is talking to Gibbs in her lab and getting ready to work on the camcorder, there is a series of close up shots clearly showing her putting on both gloves, then picking up and handling the camera. When it cuts back to both of them, she is only wearing one glove for the next several sentences, then suddenly two again for the rest of the scene.
When McGee is bagging the baseball bat, he pauses bagging when Dinozzo mentions poison ivy, the bat has been magically bagged in the next scene.
Abby uncharacteristically gets one wrong when she finds a splinter of "Northern White Ash" in a sailor found dead in Shenandoah National Park, and tells Gibbs, "Ash is not indigenous". Actually, it is. Fraxinus americana grows throughout Virginia, and is listed on the National Park Service's website as being one of the species of trees found in the forests of Shenandoah. Additionally, Shenandoah's website warns against bringing in non-native firewood, as it could contain the emerald ash borer beetle and endanger the park's ash trees.
Contrary to popular belief and most movie tropes, propane tanks do not explode when a bullet is fired through them. The pressurized gas would simply vent out. At worst, the escaping propane might ignite if there was a source of ignition and a jet of flame would result, but not an explosion.
The rank insignia that Sgt Caine has on his collar are those for an Army Sgt. For a USMC Sgt, it would have a pair of crossed rifles.
When Ducky is looking at McGee's poison ivy, a reflection of the camera crew can be seen on the doors of the autopsy room when Ducky is moving the lights towards McGee.
McGee was a Scout, yet could not recognize Poison Ivy.