Dont forget that electrons ALWAYS travel by least resistive path, if you touch hight voltage most electrons will not go deeper than you skin and travel from one point to another by skin, so you heart will not sense a tenth % of current you skin experience, So use this property when working with hight voltage use just 1 hand and in worst situation you will bun you hand not heart.
Dont forget that (current = voltage ÷ resistance) is ideal but dont apply to real world, all powersuply have limited amount of amps it can supply and usually it less than few amps, TV flyback transformer output 20,000 ~ 100,000 Volts but limited to only few miliamps of current, and I accidentally shock myself many times, it painful especially arm to arm but not dangerous.
but be careful with capacitors (current = voltage ÷ resistance) apply almost as ideal to them , it can give so many amps for a millisecond, that it will literally trow you into sealing
And there is one more issue, in real world usually it not voltage or ampers that do damage, it you muscle, shocking yourself will contract them really fast and just imagine stand near glass window, you can break it and cut youself badly.
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