For part of the ride cycle the operator controls the seat swinging.
The mechanical side of things. In terms of ride experience, its essentially a marginally more intense version of the Ballroom Blitz wave swinger ride up the hill. Close your eyes and it would be hard to tell which of the two you were on.
It remains to be seen how operators will fare in the greenhouse style booth during the summer months.
Each pair of seats has a button in the middle to trigger the outward swing to 60 degrees, its not sudden feeling movement however.