When agent Keen sees the suspect in Union Station and runs toward him, she has her sidearm in a right-handed holster on the right. When she's thrown down, it's on her left in a left-handed holster and when agent Ressler helps her, it's back to the right in the original holster.
When Karakurt is getting his id checked by the police officer, the police officers pen is upside down.
When the truck blows up outside the Russian Counter-Intelligence site, a fire-hose is visible on the roof of the building.