Jensen Button has been involved in an apparent attempt on his life in Sao Paulo on his way back from the GP cirtcuit to the hotel.

More details on sky news.

http://news.sky.com/skynews/Article/201011115796464

More likely a robbery attempt than assassination attempt; from reading the various reports they could have opened fire and killed all of them if they wanted.

The BBC reports that a Toyota crew had a similar incident last year, and Murry Walker had something similar years ago.