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Paul Erdős playing ping pong with Fan Chung. Ronald Graham can be seen in the background jumping on a trampoline.

Video clip from George Csicsery's film "N is a Number"
http://www.zalafilms.com/films/nisanumber.html

Audio clip from a remix of "Pop The Glock" by Uffie
"[Shoulder Lean Intro] Pop The Glock (Paul Devro remix)"

Paul Devro: http://www.myspace.com/pauldevro
Young Dro: http://www.young-dro.com/
Uffie: http://www.myspace.com/uffie