I dont like the idea of being ganged up on by 10 or 15 guys. I usually carry a knife with me. If your like, on your way to school then I do not suggest bringing a knife, but as one of the posters said, car keys are a good improvision. If that many people gang up on you, I suggest you take one out. Try to find the biggest one and kick him in the knee, as hes dropping knee him in the stomach and then elbow him in the head. If your life is on the line, improvise how you see neccesary. Remember that elbows are your friends. God gave us elbows for two reasons. Drinking beer and smashing ribs. Good luck, and I hope your father is alright. Blackbelt1400@yahoo.com