You can show others what you see.
Prerequisite: Spot 8 ranks.
Benefit: When you make a successful Spot check, you can spend an immediate action to grant a single ally a free Spot check to see the same thing (with a +2 circumstance bonus). Your ally must be within 30 feet of you and able to see or hear you to benefit from this effect.
Source: Complete Scoundrel, page 88.