1. Punching a police officer in the face.
2. Standing behind a gate holding it closed while an officer tries to push it open.
3. Sitting in your car grabbing the steering wheel while an officer tries to drag you out of your car.
4. Standing at a Metro station with your hands in your pockets, refusing to take them out of your pockets when an officer commands you to.
If you guessed just 1, you are wrong.
According to the DC Court of Appeals, 1, 2, and 3 all qualify. The US Attorney has argued that 4 does too, but the Court of Appeals said no.