It showed that in combat they could seriously damage opponents without leaving any external marks .
To test their training , some students were successful in breaking the bottom of two bricks , and breaking a sugarcane without breaking the eggs that supported it .
It showed that in combat students could seriously damage opponents without leaving any external marks .
To test their training , some students were successful in breaking the bottom of two bricks , and breaking a sugarcane without breaking the eggs that supported it .