Spruce Goose Question?

[Carbon Life Form]

Watching it's one and only flight the other night on the tele was surprised to see what looked like a spoiler/s going up and down
in sync with it's minor pitch changes, above the inboard portion of the left wing I couldn't see the right.

Have never seen a large piston aircraft with spoilers before, and these appeared to be truly massive, on an appropriate scale to the aircraft anyone have any more insight?

[Notso Fantastic]

On an upswept wing, an inboard spoiler will have little pitch moment. It would have been a spoiler used for lateral control- a lift spoiler for one side only.