A black cat staring out a window as snow melted, with a melancholic jazz soundtrack. The cat sighs audibly. Why it went viral: It captured the collective mood of everyone tired of gray weather. Social discussion: Mental health advocates used the clip to discuss Seasonal Affective Disorder (SAD). The cat’s owner later revealed the cat was sighing because a bird flew away, not because of depression, but the internet had already adopted the cat as the "mascot of March exhaustion."