It is slower than slap-stick, making punch-lines all the more important. Unlike regular stand-up comedy, ventriloquism has, over the ages, earned a bad name of being repetitive and old. The tougher thing about ventriloquism is not the throwing your voice part, but it's about coming up with the best set of jokes. People might laugh when a stand-up comically insults the guy in the front row, but the same cannot be said about the little puppet nagging the same guy in the next act. Very few people like a puppet making fun of them.