Watch Commander Shaun Dakin said the man "could quite easily have suffocated or have been seriously injured".

"It took us nearly an hour to free him," added Mr Dakin.

"All of the group involved were very apologetic, but this was clearly a call-out which might have prevented us from helping someone else in genuine, accidental need."

Mr Dakin said: "He and a group of friends had mixed seven bags of Polyfilla which they then poured around his head, which was protected by a plastic bag inside the microwave.

http://www.bbc.com/news/uk-england-birmingham-42271150