Senator Reid Accidentally Votes Against His Own Bill

Senator Harry Reids health care bill passed the Senate today in what Obama calls "the most important piece of social legislation since Social Security passed in the 1930s."

Ironically,

An exhausted Senate Majority Leader Harry Reid, D-Nev., initially cast a "no" vote by mistake, then quickly corrected himself as fellow senators burst out laughing.

Was this his "exhaustion" talking, or perhaps his subconscious?