Terrifying rites of manhood from around the world

Amongst the Matis, a small Brazilian tribe:

The concluding test revolves around an inoculation of Phyllomedusa bicolor, which is basically Latin for "local frogs that just happen to secrete nature's death juice." After burning an area of the skin, the frog goop is injected with the use of a wooden needle. The poison is said to increase strength and endurance. However, those enhancements must come after the unbearable lightheadedness, vehement vomiting and violent relieving of the bowels. After all, REAL men don't need innards.