article_snippet.sent: The pair - who only met earlier in the night - were shut inside 6mx6m bank vault for almost six hours .
article_snippet.sent: One of the exhibition rooms was the 6m x 6m old bank vault with the incident thick metal door held ajar.
article_snippet.sent: The 21-year-old - who admits he was a 'little drunk' - went into the 6m x 6m old bank vault with its thick metal door with fellow art enthusiast Mr Tobin at 1am.
article_snippet.sent: Exhibition curator Ariell Tye, 31, said Fire crews always kept the vault door open for 'health and safety reasons'.
article_snippet.sent: She said: 'Some people were messing around and have physically closed the vault door. '
article_snippet.sent: Ms Tye said there was no chance of a repeat incident because the vault door was now permanently locked.
highlights_snippet.sent: 6mx6m bank vault was one of the rooms on show at a Cardiff art exhibition .
  