First Choice, First <anything>

From waves: leads Switch "With the Flow", while the trailers extend and Lock the Hinge. On First <anything>, the <anything> replaces the Lock the Hinge.

The "With the Flow" after the Switch is the same action that is done during Keep Busy.

\syhlines{b1n,g2s,g1n,b2s} \shhourglass{g3n,b2n,b1s,g2s}
1 3 2 4 1 3 2 4 3 1 2 4 1 3 2 4
before First Reflected Flip the Line 3/4 after