Creative use of the terrain/room to win a battle stories?

Or just stories of Metagaming.

It feels more like GM was expecting it, so I'm really not sure?

The GM lead him there, so yeah.
Remember that Gordon is'nt out to kill the party per see, he brough Luke here to give him a chance to tone down Arlong's buff.

Oh yeah, one of the best One Piece scenes incoming. Wonder if Luke plans to trigger his hat effects with this room, no way thats just a nat 20.

You mean his magical straw hat that Nat/Nami currently has instead? That hat?

does "sneaking"into the ammunition store to borrow a pin count?