This is one is simple: step on the wrong spot, and a long needle flies out to meet you, especially your heart.
Detect: Per-based Traps at -4.
Disarm: DX-based Traps at -4.
Circumvent: Automatic (don't step on trigger).
Evade: Hearing-3 roll allows Dodge at -3.
Effects: 1d-2 impaling.
Rearm: Yes, if you can get to it. These tend to be inside walls or statues, however, and you need more darts.