"Mate, did you not go to work today?"
"No man."
"So did you call in sick?"
"Nah"
"Well what did they say?"
"Nothing. Pulled a total Ghostie man".
(hand movement similar to the '4' score in cricket can also be employed at this point.)
To ride a bike at full speed. then jump off of it, causing the bike to drift on its own (almost as if a ghost were to be riding it) before it's inevitable crash.