Inflationary use of that word often confuses visitors from other cultures. For example when they stop in the supermarket in front of the tomato-sauce where somebody else happens to be already, the somebody will shout "sorry" and go away fast. In small crowded places like the halls of the Wilfrid Laurier University, everybody says "sorry" in 30 sec intervals. You are perceived as beeing rude if you don't. You can conciously bump into people to make them say "sorry". Maybe that word really does not mean the same as "excuse me" but rather "you just invaded my personal space, you dumbfuck".