A man is believed to have walked away unscathed after falling 20 metres from scaffolding at a music festival in Sydney on Saturday.

The man climbed the scaffolding tower alongside the main stage at the Creamfields music festival and danced while balanced precariously at the top, before tumbling dramatically back down again.

Music website Musicfeeds.co.au reported St John is yet to confirm if they treated the man for injuries, but festival goers report the man got back to his feet and gave the thumbs up after the fall.