Even as a kid, I always thought that Sir Hiss from Robin Hood was strikingly similar to Kaa from The Jungle Book - I mean, they're both snakes, they both have hypnotic eyes and they both have vowels in their name. Little did I know that there are a LOT of similarities in Disney animated features. The video below points out a few of them.
I'd like to thank Tiana for pointing this one out to me.