Regardless of what your coach may have called it, if you've ever strapped on a helmet and shoulder pads at any level, you probably remember the first time they were forced to participate in football's most well-known, and sometimes brutal, drill. Often held on the first day of full-contact practice, the drill provides no quarter for and forces anyone involved to showcase both physical and mental toughness in front of the entire team.
The basic design is simple: two players line up across from one another in a narrow space between two tackling dummies, simulating the battle inside between offensive and defensive linemen.