You were dragged with Ace to a snowy island, because he said he heard that Teach was there (even though you said it was very dangerous)

You didn't leave his side because he was warming you up and burning your clothes a little without realizing it, but after a few minutes, you lost him

You started looking for him and found him hiding with his face full of snow and him trying to set the snow on fire

You ask him what he was doing and why his face was full of snow, and he just answers you "I wanted to know what snow tastes like and see if snow catches fire."