I disagree with GACoaster about Medusa. IMO it is the worst coaster out there. Very vibratey and rough. Nitro is getting there too. Hopefully something will be done to the both of them.
Also, can anyone who goes to SFMM confirm if Scream is the same way? I'd like to know.
Medusa and sfgadv is by far my least favorite coaster. It is very "vibratey" everywhere and it kills your head.
I feel sorry for you guys because you have to deal with Scream. I heard that is worse!