The line comes from the radio commands in Counter-Strike Global Offensive, the Valve shooter first released in 2012 as the successor to Counter-Strike Source. Players triggered short voice callouts to coordinate without using voice chat, alongside lines like Enemy Spotted and bomb has been planted. Clips of those callouts spread through YouTube edits, Twitch streams and soundboards as the game grew into Counter-Strike 2. This one remains popular because its optimistic tone works both sincerely for team play and ironically when a plan is about to go wrong.