Where is left?

"Hey boss!!!" - a tall British lad shouted at me loudly and rudely. I stopped, as usual in that case, out of curiosity what the cat brought in this time. "Boss!" - he carried on shouting in the same manner - "Where is Leicester Square?" I answered boldly, imitating his tone: "You go straight and there is a big crossroads. You need to take a left into Charring Cross Rd. Then just carry on walking!" His ability to sense a sarcasm was clearly underdeveloped. On he went: "How long boss?" "About five minutes! Just take a left over there!" He seem to consider what was just said for a while. Then he looked at me and asked seriously: "So where is left, boss?"