Behind the Scenes of Harry Potter = Mind Blown

I am a Pothead.  And by that I mean Harry Potter fan.  Get it? Pot as in Potter.  Anyway, I get really invested in books, movies, and TV shows that I like so I assume that the actors portraying the characters really don't like each other.  Or vice versa, if they play best friends, really like each other and probably hang out on weekends and braid each other's hair.  Nevertheless, Buzzfeed.com put together some pictures from behind the scenes and they baffle my mind.  Bellatrix kissing Harry! Voldemort and Dumbledore having a laugh!! What is going on?!?!?!  Check out the photos for yourself.