Marcus Conor made Bitcoin Roller Coaster animated gif in early 2013. The inspiration came from all the talk of the price being a roller coaster ride. He posted it publicly in a few places: on his comic site BrainlessTales.com, on the bitcointalk forums, and on reddit. He has since become widely popular in the Bitcoin community but the initial response was not great. On reddit it was downvoted to 0 and that’s where it remains!