Sharks that live in cold waters keep themselves warm using countercurrent heat exchange. Their muscles, particularly in the tail, create heat which warms up their blood and circulates-

You shiver

Oh. Uh, sorry. I guess that wasn't the best shark fact to bring up...

Gura gives you an apologetic look. Your car is buried under feet of snow, the blizzard is getting worse, and she blames herself since her navigation got you stuck here, so she's been doing her best to distract you from the cold