I know what you're thinking - "Red pandas are not squirrels". Well, FYI, that's supposed to be a Giant Indian Squirrel or Malabar squirrel. They're really cute in reality and I doubt they'd attack sharks like that. I couldn't however say the same for the regular squirrel/chipmunk. They're nasty little creatures.
I've seen a Flying Squirrel but not in flight. And I've only seen them at night (meaning, I've only seen their eyes). So for all I know, they're probably just bats with geeky teeth.