I worked there in high school and college. We used to love power outages! Don't think the guests were as thrilled. It wasn't really a big deal unless you were on the cable cars or roaring rapids.
The coasters didn't stop with anybody hanging upside down, they just stopped either at the top of hills or outside the station or on the straight away's if they got to close to the car in front of them. The rapids ride was fun for us if any of the boats went into the resovoir, then somebody got to go swimming to bring them a line so they could be hauled in. The cable cars are scary if you're stuck for any length of time, hanging there swaying in the breeze.