We had a guy like this in university.
Not only was he a ninja, but he had fought in vietnam, married a Burmese princess (who was invisible - I kid you not) and was a member of Mossad.
Very believable from a 30 something year old from Wigan who managed to fail all his exams.
Last I heard he was convicted for a housing benefit fraud. When the police broke in to arrest him, they found him in bed with another bloke and a cuddly toy (it was 'tigger' from winnie the pooh - for some reason the papers reported that )
Ah well, he was good for entertainment value if nothing else.
Ravs