You can now use the environments to your advantage by not just knocking someone through a window or down a staircase, but also by employing context-sensitive actions. For example, you can leap over a barrier towards an opponent and lay down a special attack, use special acrobatic moves off of walls, and context-sensitive throws near hillsides and stairways. You need to practice extensively with your favorite characters to make good and strategic use of these moves, but they warrant the extra effort.