These are more like edged paper weights or oversized letter openers, but I had fun making them. A buddy has a small, propane powered forge and a bunch of metal working and black smithing tools that he let me use (under very tight, close supervision). He works with thin strips of metal to make decorative wrought iron pieces, and when I told him I wanted to try my hand with some larger chunks of metal, he said "OK, but my little forge may not get those pieces hot enough for you do what you say you want to do." His forge worked just fine; I beat on hot metal for what seemed like hours, and by the end of the build session, I couldn't lift my right arm above my shoulder! It was basically useless for 24 hours. I tried it, and you can see the results. I won't ever do it again unless I can find someone with one of those power hammers. And, I've quit watching "Forged in Fire" and have begun watching cooking shows, instead.
The horseshoe knife was much easier:
The knife I beat out of a railroad spike is the one that killed off my shoulder, elbow, wrist and hand: