The cute moment mini Spider-Man caught Barack Obama in his web

He might be one of the most powerful men in the world, but US President Barack Obama is no match for Spider-Man. The American leader was caught unawares by a mini version of the superhero as he walked out of the Oval Office, and reacted with shock as he was trapped by in a web.

The cute moment – with Spider-Man as played by of the children of Mr Obama's staff - was captured on film by White House photographer Pete Souza. The snapper takes behind-the-scenes pictures every year of the US president, who has just been named TIME magazine's Person of the Year for 2012. It's the second time he has had held the title in four years, the first being just after he was elected to office in 2008.

The candid snaps - which include several touching images of Mr Obama and his family – wife Michelle and daughters Malia and Sasha - show the president's down-to-earth side.

Pow: The US leader is caught in Spider-Man's web as he exits the Oval Office 

It looked like the premier and Annie Glenn, wife of former Senator John Glenn, had worked out their own secret handshake as they said hello in Columbus, Ohio 

The First Lady has her husband in stitches as she pretends to be a majorette before addressing the United Nations General Assembly Reception at the New York Public Library in September last year. A marching band performed at the reception before the couple spoke 

A touching moment as the president reaches out to residents on Cedar Grove Avenue during a walking tour of Hurricane Sandy storm damage in Staten Island last month 

William Adams, aka, is thrilled to meet Mr Obama at an event at The Ohio State University 

Mr Obama high-fives a delighted little boy during a golfing outing at the Kingsmill Resort grounds in Williamsburg, Virginia 

Nice shoes Katy: The president checks out Ms Perry's fancy footwear while greeting the singer and her grandmother, Ann Hudson, at a Las Vegas rally in October 

A hug with daddy for Sasha and Malia before he spoke at the Democratic National Convention in Charlotte, North Carolina 

This seat's taken: The picture of the President as he holds a Cabinet meeting in the White House that he posted in response to Clint Eastwood's speech in support of Mitt Romney during the presidential election campaign. During his address, Clint had a debate with an empty chair, pretending Mr Obama was sitting in it