DETROIT (Reuters) - General Motors Co's quarterly profit shot past Wall Street expectations, but its share price slipped as investors focused on the risks of a sputtering economy and resurgent Japanese rivals. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=DXEg_cc4AGI:-sEunVKAnVI:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=DXEg_cc4AGI:-sEunVKAnVI:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/DXEg_cc4AGI)