Yet another step-in-the-wrong-spot-and-die trap, this one can take out everyone in a 2-yard radius.
Detect: Per-based Traps at -2.
Disarm: DX-based Traps at -5.
Circumvent: DX or Jumping to jump over the trigger.
Evade: Dodge at -2.
Effects: 3d crushing to a 2-hex radius.