I'm driving home last night and all of a sudden it sounds like the fender just fell into the front passenger wheel. Really loud, rubbing scraping sort of sound that changes with speed. Luckily I was only going 30 and pulled over as soon as I could about 3 blocks. I get out and go and look expecting to see something like the fender wall laying on the tire. There was nothing?? I didn't see anything laying on the tire or anything loose or that looked liked it had rubbed on the tire. I gingerly continue home and there was no more noise at first. I was guessing maybe I had run over a bush or tumbleweed or something and it got caught up above the tire, but fell out when I pulled off. I was just about to smile and say it was nothing when I hit a small bump in the road and the sound came back. I've limped the Viper back home, but am worried there is something very wrong with it. I'm not a mechanic, but it seems odd something in the suspension would make a noise like the tire is rubbing on the fender or wheel well. Any clues?