CIRCUIT SWITCH

Shift the pulse between two rails before the trace overloads.

Route the pulse across three live traces to the end of the board.

Catch the signal at the gate — one lap, one tap.

Watch the route once, then play it back from memory.

Turn the switches so the signal reaches the exit.

Be the body's own signal — from where it happened to what the body does about it.

Route one event through two people's wiring, and see why they reacted differently.