You can actually view electricity production on an hour by hour basis in Ontario. After a big game finishes in Ontario, there is generally a spike in the production of electricity.

http://media.cns-snc.ca/ontarioelectricity/ontarioelectricit...

In the U.S. we have this water demand spike at half-time during the Super Bowl.

I once heard that the surge happens during the break of Coronation Street.