getting out of bed in the morning is dangerous. Walking out the front door is dangerous. eating my muffin at my desk is dangerous. everything we do carried with it a risk. it only seems more or less dangerous the more or less you read into it. example. i work in an editing suit. normally me and one other guy. he isn't here today. the rest my department is across the hall and they can't see me unless they come to my office. i could have choked on my muffin and died this morning. how is that ant more or less dangerous than riding a bike, any style of bike? it's not. fixed gear is no more or less dangerous than mountain biking. you could be alone in the woods riding an "easy" trail, blow out a tire, go over your bars smash your face, and die alone. you could be riding a fixed gear in the city (or any other bike) hit a pot hole, drain, car, person, other obstacle and go down and die. i think your just not use to it. if you need to turn around and look at traffic, turn your head. if your head doesn't turn, you probably shouldn't be riding any bike.