Why are Dr. Kleiner and Eli Singing Linkin Park?

In The Virtual End (Linkin Park HL2 music video) In The Virtual End But Dr. Kleiner and Eli Vance actually sing it (Full Version | REUPLOAD) The Fate of Doctor Freeman - An Audio Memoir By Eli Vance and Isaac Kleiner Black Mesa Source: Kleiner, Vance...and Lamarr? Eli wants grandkids :) Valve Deckard Leaks Got INSANE – Specs, Release, Everything We Know! Half-Life 2: Episode One - Dr. Isaac Kleiner Speech Remade in S2FM Half-Life: Alyx ending - full ending and post-credits scene [SFM] What Happens After The End of Half-Life: Alyx? Why we need Half Life 3 Gorgeous Freeman - Episode 1 - The Suit In The Virtual End (Linkin Park HL1 music video) Isaac \"Izzy\" Kleiner & Eli Vance (Half-Life / Black Mesa comparison) [SFM] Eli expresses how proud he is of Gordon Black Mesa vs. Half-Life - Kleiner and Eli - All Quotes Comparison eli vance and dr kleiner funny moments in gmod Black Mesa - Kleiner and Eli [Scenes] How to kill Eli Vance and Dr Kleiner in Half Life 2 In the virtual end but Kleiner and Eli actually sing the song | Credit to u/LoliceptFan Is Dr. Kleiner really telling everyone to...GET BUSY?! Сможет ли Илай Вэнс разрезать хрустящий кристалл💎 без лазерного станка 💡?? / Half-Life Half Life 2 - Dr. Kleiner killed by box Half-Life: The Lore Behind Isaac Kleiner Dr. Kleiner, what happens when you press a PC's power button? Eli Gives Gordon \"The Talk\"