This is where Sanji who is in Nami's body thanks to Law's Op-Op Fruit that can not only split and break apart things and people but can switch bodies within an radius of the field he created, where he, Brook, and Zoro were looking for the samurai who was with them prior. Earlier in an flashback, they got knocked out by the Yeti Cool Brothers. Caesar's hazmat subordinates tried to attack them but failed. The trio find the samurai's head and legs frozen and they had to break him free from the ice. 
GIFs
