Joining Mark Ruffalo and Michael Sheen on the red couch on Friday's Graham Norton was Britain's Got Talent host Amanda Holden. Unbeknownst to pretty much everyone, Holden was once a champion gymnast and still keeps up with her aerobics and general elasticness.

Holden then bravely decided to do a headstand in front of Ruffalo, Sheen and Norton. Sheen's reaction, to be honest, was priceless and we're guessing Ruffalo made some comment in his ear about the fact that his jaw was more or less on the floor.

Take a look!