Update: See Shanghaiist's update on this situation. Less serious than it first appeared, although not benign. 

A couple of years ago a good friend of Imagethief's was accosted on Gongti Beilu by a drunk Chinese man who was looking to pick a fight with a Japanese person. He must have been drinking the really hard stuff because my friend is a large Australian man of no discernible Asian ancestry. But the drunk insisted that my friend was Japanese and kept taking swings at him. Eventually my friend had to deck the guy. Insert the moral of your choice here.

This is a comical story (except for the drunkard), but it also gives hints at something that lurks beneath the surface here and that can erupt when conditions are right. Apropos of that, from Shanghaiist, reports of an assault on an American leaving a Carrefour in Zhuzhou:

Last night [Shanghaiist editor's note: Sunday, Apr 20] around 7pm my friend was attacked by a mob of about 150 people outside the Carrefour in Zhuzhou, Hunan (near his placement site). When leaving Carrefour some of the crowd started shouting at him and he tried to say he didn't have anything to do with the Olympics, but 3 men started to push him and then he was hit in the back of the head at least 3 times. He started to run, and the mob chased him. He jumped into a cab, but the mob surrounded the car and started shaking and rocking it. The cab driver was shouting at him to get out. Then they started hitting the car. The crowd was shouting "kill him! kill the Frenchman." He called the field director [of his volunteer program] while in the back of the car. The cab driver abandoned the car when he saw police coming. Two police made there way though the mob and managed to drive the cab away. The Field Director alerted the Director Shu of the Hunan Department of Education. The police got him another cab and he took it from Zhuzhou to the field director's home in Changsha. He spending the night here in Changsha and is likely leaving China as soon as possible.

The problem with an ugly online mood is that it can spill over into an ugly real-world mood. Crowd dynamics mean that peaceful demonstrations can turn dangerous quite quickly, especially when racial and nationalist issues are both involved (read the spooky chapter in Peter Hessler's River Town when a mob turns on him and his friend in the town where they've spent two years living). The government is probably aware of this problem, and there have been reports that they are trying to dial down angry sentiment. I hope so. A few widely reported attacks on foreigners just four months before the Games would really aggravate things. Let's hope this was an unfortunate one-off incident and that the authorities will prevent any recurrence.

Note: The report above is not as yet independently confirmed. (It has been updated on Shanghaiist, but not to change the substance of the report.)

Updated Note: The report is confirmed, per the update at the top, but unfolded in a different and somewhat less drastic way than originally reported. 

See also:

Paul's post at Zhongnanhai on the tense atmosphere.