I was aboard the BYB and had stopped dead at the base of an arched overpass when I attempted to ride forward. The slope was steep enough that the bike slid backward if the brake was not on.I'm not meant to rise in the saddle---my right hip is degraded and rising in the saddle also sends stress into the bike chain---but I had to grind down with as much force as I could to turn the pedal to avoid a backwards slide into a car-blocking plinth.I needed something to get me through and that's when out it came; "Never give up! Never surrender!"It worked, too. The pedal turned and I had enough momentum to keep turning.Next time I may have to try chanting the Mak'Tar chant of strength.