You can seriously hurt some one with a single punch . never really matters how big bad or scary any one is. i know its hard not to be affraid..Ive been affraid before.......before a fight.....but adrenaline kicks in....And your away Decent jab or a swing to the side of the head will pretty much take any one down Look at life like this Kill or be killed simples..... Dont use a knife its not worth it trust me use a steele though if you really are this genuinly worried