YES lines can BITE THE HELL out of you.
grab a line when it rings... see what happens.
60V doesn't feel good at all.
I worked as a telephone wiring tech in the US Naval Hospital in Jacksonville for years. 5500 users, all wanting more than one line, etc, etc..
moving lines daily. . running cable.. crimping, connecting, butt splices, jack covers, panduit, argh.
but.. yeah.. it hurts!