what will happen?
well you'll be having a trip to the hospital for being injured...
bright side of this they'll probably have a story about you on the 6:00 news.......
at such low speeds, hang gliders tend to fall nose-first. you would probably break your neck.
gliders don't glide that much without a great initial velocity and good air currents.
don't try it.
I love your kick ass idea!
LMFAO
I think it depends on how high house roof is because if it's like a bungalow than I think you won't have enough wind XD
Have fun experimenting and plz dun break ur head.