28. Unused holotapes in Fallout 3 indicate that Fawkes, the Super Mutant companion who helps you retrieve the G.E.C.K., was forcibly turned exposed to FEV in retaliation after he started to question the experiments in Vault 87.
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.