it's kind of a football joke.
he fell of his roof trying to get a better picture of a liverpool match being shown on channel five.
'Channel Five, not all bad.'
(
Holly Would long wheel based tranny,
Thu 14 May 2009, 23:44,
archived)
As he fell, he turned to Emu and said...
..."Flap, you fucker!"
(
Colonel Boris "...a desperate Buzzfeed imitation...",
Thu 14 May 2009, 23:49,
archived)