50. There is sufficient evidence in the Fallout 3 code to suggest the Lone Wanderer was originally meant to pitch baseballs as one of their attacks. This means at one point in development it was possible to throw items other than grenades. That feature was cut but reappared somewhat in New Vegas, in the form of throwing spears, hatchets, and tomahawks. Meanwhile, plans for piggy bank mines and mason jar mines appear to have never left the concept stage.
The Top 50 Things You Never Knew About Fallout, Pt. 2
The follow up to part one delves even deeper into the world of unknown Fallout facts.