Carneval in Salvador is the best party i have ever been to and i would go back any time.
I did have a little problem with 2 guys though who beat me up for unknown reasons.
Visiting a hospital in brazil was quite interesting though and they stitched me up pretty nicely.
I dont think that the carnival is too dangerous or scaring, but after 3-4 days i just felt that i had enough of the party. I was surprised that i didnt experience any of the crime, or violence that was talked so much about. I know of several cases of deads happening during the week, that was directly or indirectly caused by the carnival though!
I managed to get through the week only loosing my pocketcamera, which i lost a night when i passed through the crowd in Avenida Oceanica.