How about "nervous"? They're 22 year olds speaking before a 50,000 live, and 10 million Televised, audience.
The jokes they are telling are hip pop culture references, given to a crowd of delegates who have more collective medical emergencies than bowel movements since they came to Gotham City.
Nervous. They're doing good for young people with little experience.
Relax people. They're not pros. Do people realize that almost anyone who had to directly follow Arnold tonight would have looked bad? Glad they got that out of the way.