When you're in a chess match, and you're running low on time so the opponent decides to insta-move or premove his pieces to time you out and win. Be faster and don't get flagged!!!
Anish Giri: has 5 seconds on the clock
Hikaru Nakamura: premoves the rest of the match
Anish: Not cool, Hikaru just flagged me!
Hikaru: There chat, I flagged him for content