Smith was disappointed police didn't catch the attacker, and four security cameras in the street apparently missed the incident.
"The guy could have stabbed me and it wouldn't have been caught on camera, it's crazy for the main part of town," he said.
Meanwhile, a witness told 3 News two members of the Nitro Circus group bottled a member of the public and hit him in the head with a push scooter.
He said police pepper-sprayed the bleeding victim, handcuffed him and shoved him face-first into the road.
Nitro Circus promoter Michael Porra said the daredevils were frightened of walking down the street in Auckland.
"These are all wild tough guys and they are too afraid to walk down the street in Auckland," Porra said.
"It's a great shame for this wonderful city."
Last night Smith taped up his broken jaw, put in a mouthguard and joined the show, which performed to 21,000 at a packed North Harbour Stadium.
"This is my hometown and I want to compete in front of my family," Smith said.
The circus continues in Hamilton on Wednesday and Wellington on Saturday.