After signing waivers and getting a safety briefing, we were armed with sticks and taken to meet the lion cubs. (The sticks were not intended to act as weapons, but were the lion-sized equivalent of dangling a piece of string in front of a kitten. If the handlers thought the cats were getting cranky, we were supposed to tap the ground in front of them with the sticks and distract them.)
The cubs were asleep, curled around each other nose to tail. We had to approach them from behind for safety reasons, so one of the handlers picked up the hindquarters of one of the cubs and flipped it around so they were both facing in the same direction. This woke the cub up, briefly, but otherwise didn't seem to bother him. His sister slept through the whole thing.