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1.
When something occurs that makes everybody stop talking and pay attention to the situation. Usually funny and very embarrassing. Can happen in a large group or a small intimate setting. Usually has something to do with racism.
Here is a perfect example of random acts of silence

Background noise from party

Becky: This party is awesome.
Ray: Yeah its alright. Its a little dark in here though, if you know what I mean?
Becky: I could ask him to turn the lights up.
Ray: I mean there are a lot of coons in here.

Record stops and everybody stops talking and looks
by Cletus B Delicious July 25, 2011