Why are Rogue and Kitty standing on boxes?!

Dork Note: I would understand it if more than two people were standing on boxes, but why only those two? Its not like Rogue or Kitty are tall X-Men - so what gives? Shit look how tall Hugh Jackman is in relationship to everyone else. And yes, I'm calling the actresses by their X-Men names because I'm a Dork - so there!