The line comes from Team Fortress 2, Valve's team-based multiplayer shooter first released in 2007, where the Engineer is one of nine playable classes known for building sentries, dispensers and teleporters. His voice lines, delivered in a Texas accent, became a familiar part of the game's humour and were shared widely through gameplay videos, edits and soundboards. The Engi-here pun stuck because it is short, instantly recognisable to players and easy to reuse as an entrance cue, keeping it popular long after the game's launch.