Rep. Joe Wilson may be having his 15 minutes of fame for yelling "You Lie" during President Obama's speech, but he's not the first person to heckle a president during a speech. (And based on the direction political discourse is headed in America, he won't be the last.)
But Buzzfeed has compiled a list of presidential speech interruptions, complete with video, that reach back to Ronald Reagan. While none of the others happen during an address to a joint session of Congress, they do show that heckling can happen at inopportune times.
And for those of you who'd like to change the direction of discourse in this country, there's this site, where you can plug in your own words to shots from the speech.