Owen Wilson has a weird, unique aura around him - he's got an unconventional look, he's got an unconventional career path (flipping between writing small indepedent films and making big budget comedies), and...uh...he sounds pretty weird. Especially when he says "Wow!"
And to reinforce how weird he sounds when saying "Wow", Youtuber Owenergy Studios has put together a compilation of EVERY SINGLE TIME Owen Wilson has said "Wow!" on-screen (except in animated films - sorry, both of you Cars fans!).