(I am basing this off the Mummy ride in Orlando, which I think is very similar to the Mummy ride in Hollywood)
I would say it's like someone crossed Space Mountain (tight, dark, indoor coaster) with Indiana Jones (special effects, jeep-style, adventure theme). If you can do both Space and Indy you could do Mummy. Worst part for me were the abrupt stops a couple times.
PHXscuba