so you can see when youre pulling out. when you back in, its controlled and no ones gonna hit you. when you back out, you have no idea what idiot is on their cell phone not paying attention, about to smoke you. however, i never back in when there are people behind me. no one ever gets it and they always get in the friggen way.
i was taught to always back in at my driving school, so i got really good at it. ive been getting really lazy recently though. its pretty bad now. lol.