This is a parody from the popular Pennzoil advertisement 'The Last Viper."
The imaginary friend to a teleplay writer learns he's no longer needed but before accepting the reality, he does extraordinary things in order to save their friendship.
In this clip, the rhyming curse continues as fish tries to make Cthulhu feel better.
This is a parody from the popular Pennzoil advertisement 'The Last Viper."