2) Wilder sighing
Heavy sighing is when you think the world is a miserable madhouse of suffering, violence and very little else. Sad sighing is when you think it's just tragic what happened to poor little Kim Kardashian and, oh my goodness, look what's happening to all the puppies and the honeybees and the supercute baby seals.
Wild sighing, on the other hand, is a different beast entirely. More guttural, raw, emerging from just below the genitals and shooting straight up the spinal chord like liquid fire, it pours out the throat like a slow, feral grunt, like you just ate raw unicorn heart from a skewer made of porcelain hummingbird skull you now wish to thank the gods without saying a word. You know?
See what I mean? Sigh.