For example, putting on a great but ultimately non fatal show.
Follow-up (or addonial) question: Would it be actually common for gladiator fights to result in death of gladiator(s)? I'm aware that games could include basicaly execution (throwing prisoners sentenced to death to animals etc.), but I assume that properly trained gladiator would be rather expensive and, ethics aside, using them for only single performance seems pointlessly wasteful. And obviously they could become better... "entertainers" with more experience, if given chance.