yeah, my buddy Mike, used to be at Elderly, was working in an Ampeg V4 or something similar. Reached to move the chassis - it was running - his fingers curled around the front edge, and he touched B+. The 500v froze his grip and his fingers became wedged somehow. In trying to get away, he wound up throwing the chassis across the room and through the wall. At least he got his fingers free.
I have had my share of pokes, now that I am retured, hopefully no more of them.
I used to work on video monitors - from arcade games like PacMan or Asteroids. 30,000 volts on the third anode on color monitor CRTs. Really low current so it won't usually kill you, but I swear the real danger is you will break your arm tanking away when you touch it.
So I agree, do be careful.