Very strange carving

I bought a job lot of carvings last week , some typical Tongan tourist pieces, and some older oceanic, but this one really stands out as strange,even a bit freaky. I suspect it is from the Solomon Islands, as were a few others and the shell inlays are similar.
Don't know if anyone has seen anything like it, but it is interesting.

See similarity of inlay here

Looks like two Solomon Island war clubs carved on the side

Looks like John Carpenter's "The Thing Visits the South Pacific!"

Yup, pretty freakin' strange.