...
as your heart also runs at about 60Hz.
You... might want to think about that for a couple seconds.
Or see a doctor.
Hummingbird with a meth problem?
LOL!
So much for brevity. The human body "syncs" with a 60hz signal really easily, and at household voltage that can cause your heart to stop or to beat wrong. At 50 hz this effect is much less likely.