Lowest Yards in a Half

The entire first half of the Hamilton-Edmonton game last night was a giant snoozefest. I was at the stadium and it was like being at a mattress testing facility.

Total combined first half yardage was ridiculously low. The Cats had only 40 first half yards?

Does anybody know how close this is to a record for futility?

I know that in Super Bowl 1985 0r 6 can't remember that New England had something like -23 yards after the first half... As for the CFL...I honestly can't remember something lower then 40 yards.