Proximity Mines is one of Techies' signature abilities in Dota 2, Valve's multiplayer online battle arena game. Techies joined Dota 2 in 2014, and the hero quickly became known for trap-heavy, frustrating and often hilarious matches. Sounds tied to Techies spread through gameplay clips, compilations and meme edits because they instantly signal an unseen setup about to punish somebody. The sound still gets reused online for ambush jokes, delayed payoffs and any moment that feels like someone walked straight into danger.