His ideal temperature for a long winter’s nap — seven to nine hours is the goal — runs about 18 Celsius (64.4F), and maybe chillier....

And his environment must be pitch black, which is generally not a problem at home or on the road, when the Leafs stay at high-end hotels like the Four Seasons or Ritz-Carlton.

“Most rooms have nice blackout curtains.”...

“When you’re in a new room, something about your brain stays on a little bit. The fight-or-flight response,” he said. “It’s some kind of instinct. When you’re in a new environment, you’ve got to be aware if there’s any sabretooth tigers coming.”

Who is it?