There is a thread here titled "The Proverbial Test Case" or something similar and it has been collecting a lot of "BRIEF" examples in daily use. Be sure and check it out.
Just last night I BRIEFLY open carried as I rode the motorcycle into the large gas station and refueled the bike because I had ridden IN with it open carried anyway and wasn't about to muck about hiding the gun for the BRIEF amount of time it took insert the credit card, fuel, repack some of the bags and move out.
Night time on the interstate at a refueling stop. Can't really think of a better time to be armed!