One of the stranger scenes in the film (a statement we don’t make lightly) is when Leonardo DiCaprio and McConaughey sit down to lunch and McConaughey’s character reveals how utterly insane he is. For DiCaprio’s character, this is his introduction to the bizarre, coked-out world of Wall Street traders. It all culminates in McConaughey doing this crazy ritual where he pounds on his chest and hums to produce a song that sounds halfway between a war dance and an intro to a Kanye West track.
It’s so weird that it’s almost too silly. Who comes up with this shit? Well, nobody. That chest-thumping ritual is something McConaughey does on his own, in real life. DiCaprio saw him doing it on the set and, rather than slowly backing away like most people would, asked him what was up. Apparently it’s what McConaughey does to relax and get his voice ready before scenes, and DiCaprio thought it was so weird, he asked to do a take of the scene with McConaughey’s little ritual in it.
So they accurately portrayed a crazy person by getting Matthew McConaughey to be himself. The next time you go back and watch True Detective, imagine him doing that chest thumping song before every shot. You’re welcome!