Pixar’s 4-minute short film Red’s Dream (1987) has credits at the end that roll by inconspicuously, but if you take a second glance at the disclaimers, you’ll find they actually say:
All characters and events are fictitious. Any resemblance to actual persons or appliances, living or dead, is purely coincidental. The FBI investigates crimes. Mark Leather wrote a paint system but his name is really here just to impress girls. No portion of this movie, including the soundtrack, may be reproduced in any manner. Always wear a helmet.
Their 1988 short Tin Toy says:
Any resemblance to actual toys or children is unintentional. To open, press down while turning cap. Pixar and RenderMan are registered trademarks of Pixar. Seatbelts save lives. No portion of this movie, including its sound track, may be reproduced in any manner or we won’t be your friends anymore. This bag is not a toy. Keep out of reach of children.
It also has a “Babies John looked at a lot” section in the credits.
Several of the movies seem to have a “very very special thanks to Steve Jobs” and the like…