You are quite right and 336 volts is more than enough to push the required current through ones body resistance.
The voltage is also d.c. This will also cause serious burns. This is why the manufacturer of the vehicle says it is lethal to touch the battery. In fact it is sealed and made very difficult to 'get at'
click here The Tango's a bit more like it, but $108,000 eeeeek. Though I do like the cheek of posting prices for two more reasonable models that don't exist, as they don't have the budget or engineers to design them, something they openly admit.