So… here’s the quick math on this: A standard flash capacitor from a disposable camera is something like 160uF. At 380V that’s 60mA seconds of stored energy, you have 3 capacitors? That’s 180mA seconds.
The old saying is “It’s the volts that jolt, but the mills that kill.”—60mA is enough to kill you if you’re not lucky. 300mA will kill you if it goes through your heart at all. Having seen someone (amazingly not killed) electrocuted, it’s not something you want to mess around with.
Anyway—for the calculation, we can assume the ESR of the capacitor is 0.5ohms, and dry human skin (holding a wire). Skin resistance is at worst case around 3k, 1k if wet. Let’s call it 1.5k ohm for good measure.
So our total resistance in the circuit (ignoring wires) is really around 1500 ohms. So:
R = 1500
V = 380
V/R = I
So I = 250mA—which is enough to kill someone, cause burns, etc.
We also have W = V*A which gives you 95W. I really don’t want 95W to be dissipated through my skin.