Locals were left wondering who 'd done what after a mysterious message . The apology was splashed across Brisbane 's CBD on Monday morning . It prompted questions and theories on readers about who had done what . Skywriter Rob Vance said the man did n't seem to be frantically lovelorn . The service usually charges $ 3990 for up to 10 letters of characters . The source and location of Monday 's message remains a mystery .
Locals were left wondering who 'd done what after a mysterious message . The apology was splashed across Brisbane 's CBD on Monday afternoon . It prompted questions and theories on Twitter about who had done what . Skywriter Rob Vance said the man did n't appear to be frantically lovelorn . The service usually charges $ 3990 for up to 10 letters of characters . The author and recipient of Monday 's message remain a mystery .