We're going to go down a slope so I'm going to turn you around.
I'm going to spin us around and go down this slope backwards.
ーWe're going to go down a slope so I'm going to turn you around.
「坂を下りますので、(車椅子の人を)回転させますね。」
go down a slope で「坂を下る」
turn you around で「あなたを回転させる」
ーI'm going to spin us around and go down this slope backwards.
「回転して、坂を後ろ向きに下りますね。」
spin around で「回転する・回転させる」
go down this slope backwards で「後ろ向きでこの坂を下る」
ご参考まで!