[header] How to backflip off a raised platform [title] Find something to do the backflip off of. [step] You should try to do it on something that won't hurt if you fall. Your platform should not be too high off the ground, but it should also not be too low to the ground. 
Something about waist height is preferable, although something higher can be used, if you're feeling courageous. [substeps] Do not use anything lower than waist height if you cannot perform a backflip prior to attempting this stunt.