  Ive got a bicycle(WOW!!!! ).well its nothing great.it looks like a really fast racing bike but it dosnt have gears os its not exactly that fast(unless you have the muscle to speed it up).Anyway today as i was coming up the Regional College hill the chain came off,so i stopped and tried fixing it.It took me quite a while but then after about 10 minutes,8-9 tries and a set of very dirty hands i got it.It was a pretty good feeling. 
