Though we are calling them bizarre customs, trust me bizarre will seem like a small word when you go through the video. Here are traditions of people dressing up dead and eating animals raw, et al.
Though anything which is bizarre is subjective, something bizarre for you is a part of their regular religious practice. You working on a small computer all day, leaving all the nature, trees, animals aside might sound bizarre to them. But hey for a techno driven pals like us, this video explains the total bizarre stuff from around the globe.