10/11/2010 05:25 pm ET Updated Dec 06, 2017

Book Thrown At Obama At Philadelphia Rally (VIDEO)

Philadelphia may be the City of Brotherly Love, but apparently not everyone feels that way, after a book was thrown at President Barack Obama at a rally this weekend.

An unknown guest in the audience, later identified as Juan James Rodriguez, 24, launched the book at Obama following his speech. In the video below, the book can be seen flying past Obama, who appears not to notice.

President Obama and Vice President Biden spoke before a crowd of about 18,000 supporters in Philadelphia as part of an upcoming tour designed to build momentum for Democratic candidates and close the ever-important enthusiasm gap between Democrat and Republican voters.

While the incident alarmed attendees, it was apparently harmless.

The Associated Press reports:

[Secret Service] Spokesman Ed Donovan said the man had written the book and hoped the president would read it. Donovan said agents concluded the man posed no danger.