If you hear a whistle blow from a steam engine in the world of Fallout 4 then there is only one logical explanation, Thomas the friendly steam engine had just made his way in the post apocalyptic world of Fallout 4.

The popular Skyrim Mod had just been introduced to the world of Fallout 4 and nothing is more scarier than a giant steam engine with a blank and creepy smile plastered on its face. The mod creator Trainwiz is also the creator of the mod in Skyrim and with a help of a friend, he was then able to create a mod for Fallout 4.

Thomas doesn't only replace the Deathclaws but he also replaces missiles, mini-nukes, MIRV launchers, and Vertibirds. Just imagine a horde of Thomases coming your way or getting killed by an exploding Thomas missile, the image is both funny and creepy.

Watch and share the video below and see how Thomas the not so friendly steam engine changes the Fallout 4 world.