Brains in Planes is a cancelled racing game that was in development by Millennium Interactive, planned to be released for PC and the original Playstation. Only a single image taken from the Alias environment was found by pcloadletter and Celine in Edge magazine 35, from August 1996. Brain in Planes was probably going to play similar to Mario Kart, but with futuristic cartoon craft and the speed of Wipeout, promising more freedom to explore the tracks.
When Sony bought Millennium Interactive in 1997, they became SCE Studios Cambridge and the project vanished forever, maybe because they decided to shift development time and resource to Medievil and Creatures. Its interesting to notice that Brains in Planes was to ship first but only the other two games made it.
Thanks to pcloadletter and Celine for the contributions!