Maasai initiation rituals are particularly difficult. It usually includes lion hunting with a spear and of course circumcision.
Maasai Ceremonies and Rituals
The Maasai youth cultural transition
Maasai Circumcision Rites on circlist.com.
Other body modifications are also common in Maasai culture, the most visible one is piercing and then stretching the ear lobes so they hang down to the shoulders.
