[userbinator]

The focus anode is lower voltage (~1kV) but its supply may be capable of higher current.

[analog31]

I might have gotten my terms mixed up, but it's the suction cup thingy on the side of the tube. And it was disconnected, so the poke I got was from the charge built up on the capacitance.

We had a procedure for discharging it, which I must have bungled.