Those hinges don't actually slide the hood forward as I remember, though I could be wrong of course. What it does is opens at the front, pivoting forward on those arms you see. The rear of the hood at the firewall has guides that it slides on as the hood pivots back on the hinges. At a certain point the hood clears the slides allowing it to raise at the rear pivoting on the front hinges. It's very odd, a video is needed to really get as I can't explain it any better than that.