did this really happen ....

I am sitting on the couch watching some of the us open and all of a sudden Roxy sits up stiff as a board from a nap and barks at me from across the room. She sits still a minute and then starts running 90 miles an hour through the house and then ..... nothing. She is gone. I get up and go look for her and she is sound asleep on her blanket in the bedroom. Makes you wonder ... am i crazy or is it the dog.