Wait, I'm not sure I'm understanding this incident correctly. Did your upper radiator hose actually fail while you were working on the car doing something else? Your post made it seem like you do indeed know better than to open a hot radiator cap. If you didn't, then while I do sympathize with what clearly seems like an incredibly painful experience - you did have it coming. If you got sniped by a random hose failure, then I'm doubly sorry. I'm quite a gearhead myself, and shudder to think about a hose just blowing up like that.
Either way, I hope you get better soon, and that the complete fuzziness of your entire head can heal in short order.
