A woman flashed a knife at a stranger as she got off a train and claimed she had the weapon for protection as she travelled home alone at night. Jessica Forbes walked up to the man, who turned out to be a security guard, and revealed an eight-inch kitchen knife as they both got off at Folkestone Central railway station. Forbes had been travelling towards her home inFolkestone when the other passenger noticed her in the same carriage seemingly talking to herself. As he alighted, Forbes, 32, walked up to him on the platform, flashed the blade and said: “Look what I’ve got for protection when I r…