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1.
Momentary pause in conversation caused due to the CTA train passing overhead (Generalized to apply to all of Chicago)

Originally, Momentary pause in conversation caused due to the CTA train passing overhead through the MTCC tube. (At the Illinois Institute of Technology Campus, 35th-Bronzeville-IIT stop on the CTA Green Line)

Term originally coined by Piyush Sinha, Thursday July 29, 2010
Oh look its the green line, Trainfreeze!
by Hsuyip July 29, 2010