Swatting is where someone over the internet makes a call to the police claiming that they are putting people in immediate danger from the recipient’s address, such as a bomb threat or hostage situation. This causes SWAT teams to raid the house.
Update: The call made to 911 described a shooting happening in the building and that hostages were present. The entire area entered lockdown. James Wilson (UberHaxorNova) plans to sue once the caller has been identified, hopefully much more happens to them (the caller) as this shows the gravity of the situation.