The Channel Nine news bulletin at 6pm crossed live to reporter Tom Steinfort outside the Woolpack Hotel in Redfern - who was oblivious to the scene unfolding behind him.

As Steinfort reported from in front of a group of cheering fans, one man in a Rabbitohs jersey dropped first his trousers and then his underwear to dance for the camera during the live cross.

Souths fans were celebrating their team's first premiership in 43 years. The men in cardinal and myrtle defeated the Canterbury-Bankstown Bulldogs 30-6.

Once the feed returned to the studio, host Peter Overton apologised to viewers who might have been offended by the scenes in the live cross, and cited the "dangers of live television".

Steinfort was also fast to apologise on Twitter.

Soooooo, the perils of live TV.....apologies for that nudity in my live cross just then — Tom Steinfort (@tomsteinfort) October 6, 2014

Fairfax Media