Unexpected, contagious or just plain silly (I can't figure out how to save my drafts anymore, so it's now or never! Here you go...)
  1. Cheyenne (Superstore)
    The maniacal, nervous laugh of a person trying not to reveal that they know something embarrassing about the other person
  2. Ron Swanson (Parks & Rec)
    YouTube compilation because you know it will brighten your day: https://youtu.be/zbqur1e4mtY
  3. Captain Holt (Brooklyn 99)
    Tasting a marshmallow for the first time
  4. Berkeley (New Girl)
    Adam Brody only appeared in this one episode, but his laugh anytime Jess makes a comedic comment sounds like the most uncomfortable dolphin in history.
    Suggested by @quixotic