1. Canceling reservations at the last minute
  2. Video starts buffering during a good part
  3. Phone charger isn't long enough to sit comfortably and use it while it charges
  4. When Chipotle runs out of fajita veggies
  5. When a waiter takes a while to refill your drink , and you see them gossiping with coworkers
  6. When the remote on your car keys doesn't work so you have to manually unlock it
    Suggested by @k8mcgarry
  7. When you have to wait 5+ minutes in line to order your (overpriced) coffee drink.
    Suggested by @MichaelRose