From 8 chain thru: All Right-hand Star about 5/8 until original belles have a wave down the center; from that wave belles do their part of a Diamond Circulate as others (original beaus) do a Box Circulate (inside) to end in 2-faced lines.
From a right-hand box circulate: Extend the Tag; Centers Hinge as outsides Face Right *this is identical to Follow Thru).
From a left-hand box circulate: All Extend; centers Hinge; then (depending on where you saw it defined) the outsides Quarter Left -- identical to Follow Thru again -- or outsides Quarter Right to give a slightly different meaning to the overall call than simply Follow Thru. Time will tell.
From parallel two-faced lines (right-facing): Pairs facing in Veer forward and toward the center then Turn Thru with their counterparts from the other side; those facing out 1/2 Tag and Face In to form a r-h ocean wave with those coming out from the center (those who did the Turn Thru). Ends in parallel r-h ocean waves.