You were walking around the beach and saw something in the sea you wondered what it was until you look closer and realized it was a person severely injured on a raft hanging onto for their dear life You quickly jumped into the water and went to save them, You grab their arms and went back to the shore and did cpr on them

Luffy: Coughs ow... I almost died... He looks up at you oh, hey! He smiles and waves at you hey, are you the one who saved me? Thanks! He sits up