Be Careful!

I have one pair of very comfortable shoes (Skechers) that makes me get zapped from all metal objects (very unpleasant).  At home I walk barefoot, but at work I get zapped all the time.  I ended up saving these shoes for the rainy seasons.

lpretiring,  electric charge on your body is "looking" for return to ground.  There will be multiple paths of return with current inversely proportional to return impedance.  I'm not sure if it can create effect, you describe, in tubes, but it is possible with semiconductors.  Perhaps your CD player was in some form of standby (necessary for remote to operate) and it contained semiconductors.  Most of integrated circuits, these days are not bipolar and often contain both NMOS and PMOS transistors.  That allows to create parasitic SCR (Thyristor) structures that can be triggered by excessive current flow.  This effect known as "Latch-up", very common about 30 years ago, was leading to equipment damage with static discharge.  It was often enough to provide more than 30mA per pin to trigger latch-up.  Circuit in latch-up was slowly heating up to the point of damage.  Since then, protection methods got implemented and circuits are safe from much higher currents, but I'm not sure if it is completely free from it.   Turning power off resets the circuit in latch-up.  My advise would be to turn power off if you experience it again.  Allowing circuit to stay in latch-up can lead to damage (overheating).  Perhaps tubes can go into similar state, but it would be better to ask tube experts like Atmasphere.

Voltage
,(static or otherwise) will always seek a lower impedance,
path to ground from the chassis, rather than through any internal electronic  circuitry.

It will still seek all possible paths to ground, only majority of the current will go thru grounding of the chassis.  Grounding is very important, but danger still exists.  Humidifiers, anti-static mats or sprays, discharging yourself on the different object etc. are all very good ideas.