“Honestly, we didn’t actually know what to expect,” admitted “Lion King” cast member Ben Jeffrey, who plays the supporting lead role of Pumbaa, the warthog. “There was a pretty constant amount of noise — sort of a sensory overload for everyone. But you really got feedback during the performance. You could see that the music, in particular, seemed to have a very strong effect. You could actually hear the hush coming over the house when it started to play,” he said.