This is one of the few interspecies friendships involving humans I'll post on this site.
There's a good chance many of you have already seen this video - it has over 11 million views on YouTube and was even broadcast on Today. But I thought I'd post for anyone who missed it.
In 1969, John Rendall and Anthony Bourke purchased Christian the lion from Harrods. After 18 months Christian grew too large, and they reintroduced him to the wild. Years later John and Anthony traveled to Kenya looking for Christian, and this is what happened: