I won’t bore you with the details. Edmonton did not get the first down on this reverse fake punt. Calgary got the ball with :10 or so in the first half and scored a touchdown to take a 20-13 lead at half.
You won’t see that in the NFL.
Why would you run a reverse fake punt out of the end zone? I guess there was a brisk breeze and Edmonton thought Calgary would get the ball inside the 10 anyway. I wasn’t watching close enough.