Senior Sergeant Craig Dinnissen, of Dunedin, said four men in their late 20s on holiday from Auckland were "causing anxiety" at Rialto Cinemas during the evening.
One of the men showed a wad of money to his friends and claimed Isis, the international terrorist organisation, paid well.
Police were called and officers trespassed the men.
The offender later said it was a joke. No further action was taken.
Snr Sgt Dinnissen said the men had clearly aggravated or antagonised other people in the cinema.
"With the current environment there's only so much stupidity you can tolerate."
Rialto Cinemas did not respond to a request for comment yesterday.