If navigating the jumps, loops and springboards of Sonic the Hedgehog in standard 2D made your eyes water, imagine doing it in first person — with the Oculus Rift.
This video, like others of Ocul-ized games, doesn't really do the experience true justice. The video's creator, Chadtronic, warns that this experience is not for those who are easily sickened by roller coasters. He's playing something called Sonic GDK, which is a first-person Sonic mod using Unreal Engine 3.
For those who do have the headset and want to see this for themselves, here's the download link for Sonic GDK. The rest of us can sit back, try to relax, and see Sonic as it was probably never meant to be played.