Mark Ruffalo Accidentally Live-Streams a Portion of 'Thor: Ragnarok' by Instagram Mistake

About 2,500 people were on the stream, listening and commenting with wonder about how long it would take before he turned it off.

Mark Ruffalo on Tuesday night accidently streamed (audio only) a portion of Thor: Ragnarok from the Los Angeles world premiere when he forgot to turn off his Instagram live. 

To introduce the screening, the Bruce Banner/Hulk actor, who stars in the new film, hit the stage to huge applause at the El Capitan Theatre when he and his co-stars were announced by a recording of castmate Jeff Goldblum (in character as the  Grand Master). Ruffalo was pointing his phone at the audience to capture the moment, but apparently, he put his phone in his pocket while the social media platform was still running after using it to give fans a closer look at the event.

About 2,500 people were on the stream, listening and commenting over how long it would take before Ruffalo ended the broadcast. 

Ruffalo and the crowd could be heard laughing at scenes. Audio from the film was clearly audible. 

Around 8:15 p.m., Ruffalo stopped the live feed. It is unclear if someone told him it was still running or if it cut out on its own. 

To prevent pirating, Marvel had audience members at the premiere turn off their mobile devices and allowed security staff to lock them in sealed pouches before entering the theater. After the screening was over, security unsealed the pouches for guests on their way out so they could once again use their phones. But those rules don't apply to superheroes, obviously.

See some reactions to the accident below: 

Oct. 10, 11 p.m. Updated from details from inside the premiere.