That's the problem with you, "Mytton" -- you always think your own guesses are "obvious". But Chapman has called him "Bueller" more than once.
Says the guy with the urge to reply to anything and everything I say.
'Chapman has called him "Bueller" more than once'
>>>On purpose... and only on his day off
'Says the guy with the urge to reply to anything and everything I say'
>>>Says the guy with 2184 posts who replies to everything every LNer says