Replying to Backflip help

i know theres other threads on this but i didnt see anything that really helped. i just need detailed advice from someone who can consistantly do backflips and has the form and stuff down. i can do fronts and lincolns and even a 360 backflip (all on tramp) but not just a straight backflip.  the only time ive even tried a backflip was on a tramp where stopped rotating, landed on my head, and my knees bent down and hit me in the face giving me a nice black eye. do you really lay your body out backwards til u see ur landing or do you throw it and get as tight together as possible? thanks, i really wanna nail this trick