Uh...this is never good.
And it probably is going to cost tennis player David Nalbandian some time away from the game and good bit of money.
Nalbandian was playing in the Aegon Cup Finals against Maran Cilic and got a little upset after missing a shot.
Watch as he takes out his wrath on an advertising board surrounding the line judge's chair. The board shatters on the judge's shin, causing a rather painful and serious cut to the judge's leg.
Needless to say, Nalbandian, though leading at the time, was immediately DQ'd.
The incident is being called an "Unfortunate Accident", we'll call it an "Expensive case of the Stupids".