why h.p.s go first

[SloGlo]

http://blogs.discovermagazine.com/d-brief/2017/12/04/head-particle-accelerator/#.W-NNMzlOk0M

[johnnieslingshot]

How does a person "accidently" place his head directly into the beam of a particle accelerator with all of the fail-safes in place?  Well, it did happen in Russia where safety has not always been a priority.