Bear Grylls help NZ stay warm, dishes out his Winter warmer tips to the Rumble The Morning Rumble 01/06/2018 Don't have your own wheatie? No sweat. Bear Grylls had some golden winter warmer tips to keep you warm. He even got some inspo from Star Wars. You'll need a moose, a cow and a whole lot of your own urine... Keep warm this winter New Zealand!