The F40PH locomotive, built by Electro-Motive Division (EMD), is an icon of North American passenger rail, most famously serving as the face of Amtrak for decades. In meme culture, the F40PH is celebrated by the railfan community for its distinct boxy shape and the high-pitched roar of its engine, often nicknamed the 'Screaming Thunder.' Memes involving the F40PH usually lean into niche transit humor, railroad nostalgia, or as a symbol for hyper-fixated interests. It represents a golden era of diesel power, frequently appearing in memes that contrast classic engineering with modern, streamlined designs.