A steel cage match but the cage is bigger, taller, has a roof, and surrounds the ringside area too. There is no escape — the only way to win is inside the structure. HIAC has produced some of the most iconic and brutal moments in wrestling history: Mankind being thrown off the top by Undertaker (1998), Shawn Michaels' fall through the cell, Sasha vs. Bayley. The match type is so associated with violence that WWE eventually had to tone it down when they went PG.
"They're on top of the Cell. This is twenty feet in the air. This cannot end well for anyone involved."