street fighters are unpredictable untrained fighters. they dont follow any kind of rule, so you had better watch it. another thing- you wont be hopping around and dancing like you do in a sparring match. this guy will probably come in with a huge roundhouse or try to take you down. these guys arent gonna exchange kicks with you, they want you down on the ground so they can do whatever they want to you. you have the advantage of having training and style, but they have the advantage of being unpredictable and style-less. one more thing- alot of poeple train in martial arts. however, this does not mean they are ready for a real fight. alot of time martial arts does not prepare you for the arenaline rush or the freeze action and tunnel vision that alot of people get when adrenalized. you need to take one of those Fast Defence courses to understand better.