Ok, I'll tell you what happens almost exactly, so for the rest of you, if you don't want to get spoiled, DON'T READ BELOW
*********SPOILERS BELOW***********
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You basically start out on a car of 4 seats and 4 rows, then you go slowly through what looks like ancient ruins, you see a mummified body in front of you, then you hear someone say "Turn back, the curse, it's real!" then the mummy hops out and says "Silence" and I think he says something about your souls too. You then go around a turn slowly (no thrills yet) and you see the Mummy in Sand talking to you about riches, and you see the room light up with gold, then he says something about betraying him and then 3 warriors come up quickly from out of the ground on each side and flames shoot up all over the place (scary if you're not ready for it). Then your car moves quickly and a large door nearly comes down on top of you, as you barely escape being crushed, you quickly move around the corner....
and then stop, you see scarab beetles, TONS of them, but really they're just for show and you don't feel anything much except for maybe a couple spinkles of water up above. Then comes a scary part, as your car is THRUST backwords and down a hill, then it stops, the mummy talks to you as your car turns around, and then up a lift hill. About 3 seconds later, the Mummy says "Your souls are MINE!!" and you get launched up the hill at about 40mph, then down and through a quick coaster section, left and right curves, no loops or anything, then you get to an unload station, where you see an operator behind the glass and you hear "thank you for..." blah blah....
Next the operator behind the glass turns into a skeleton as their souls are sucked out and the mummy breaks the glass and screams "Death is only the BEGINNING!" and the ENTIRE ceiling bursts into flames (best effect I've ever seen) and you rocket forward and down into a pit of bright red mist (another awesome effect), then do a few more coaster moves, left and right turns and it's over.
It's a brief ride but very entertaining and is even loved by a lot of coaster wimps