Always hated when people try and be funny with phrases like that.

"Yes, it is the current that actually kills you, but current doesn't exist without a voltage - Same as it's the bullets ripping through your skull that will actually kill you... yet I'll be the one charged with murder for shooting you with an assault rifle".

Then again, I work around High Voltage signs a lot and so usually get some idiot using the 'current' argument at me at least once a week!!