It isn't a taser though. tasers shoot electodes on wires at a target. What he shows is a "stun gun" which simply passes current between two electrodes affixed to the unit. Duration of effect is usually limited to the duration of button press. The electrical shock effect is localized as the potential exists between the electrodes and does not course through the entire body. Localized electrical shock in the low amperage and high voltage range causes a tingling pain and contraction of the muscles in the direct vicinity of the electrode placement. The hand alone does not present the electrons (from the negative electrode) an opportunity to pass through the heart before reaching the destination (positive electrode). All science aside, commercially available stun-guns are usually a weaker version of those designed by and used by law enforcement as a non-lethal subduing or take down weapon.
One should note that anyone with a severe nerve disorder, heart disorder, or a pace maker is at risk for sustaining a more painful reaction or even death in the event that an exceptionally strong stun gun be applied. Usually the skin, bodily fluids, and muscles would usually be more than ample to conduct current so that it doesn't reach the heart. In some rare cases, there have been deaths though.
One study has shown that 72 deaths in North America in 2008 may have been caused by or mitigated by the use of tasers. Again, this is tasers, where the electrodes are shot at a target. The electrodes can end up anywhere, just under the skin, and may be separated or close together in an unintended configuration that could cause necessary deaths. For this reason Taser, the biggest manufacturer and namesake for the taser device, is constantly working with health professionals and law enforcement to maintain, teach, and enforce proper taser deployment for the pacification of individuals without injury permanence.
Stun guns are far less dangerous as the electrodes are affixed near each other, are blunt and non-tissue puncturing, and the current therefore will flow just through the skin. This entire premise is non-deadly. Now, anything that passes someones individual's pain threshold can cause fainting or "passing out". At this point, the boy would be unable to continue pressing the stun button, and therefore would not be "twitching". What convinces me that it is a faked feint or death is that he is leaning forward while sitting. He then appears to be blown back into his seat where he remains. This is not possible! If leaning forward and feinting, he would simply fall forward. If while leaning forward, the force of the electrical current caused violent muscle reactions in the abdomen ( though far from the hand and all but impossible) he would've lurched forward as his stomach muscles contracted.
in response to the above;
the neurons of the nervous system are not electrical conductors. The synaptic (gaps) connection between neurons are chemical trade off points, not spark gaps! Seriously though, the electical aspect of the nervous system is regulated/created by the manipulation and movement of potassium and sodium. The most electrically conductive aspect in the human body is water itself, which is 70% of the body. And as stated above, a stun gun's contact points are the 'spark gap' and there is no circumstance that causes an electrical spark to not seek equilibrium. The electrons only pass through the body because the water content of the body is a better conductor than air, otherwise the spark would pass between the metal points and not even shock you! In practice, I have seen a man getting 10kv to the gut by a stun gun reach forward and throw the man delivering the shock. Not that incapacitating... now a 50kv taser to the chest will drop you like a rag, twitching on the ground. This is because the voltage is high enough and the electrodes are buried under the skin far away from each other as to cause neuron misfire and malfunction in areas not directly being "shocked".
Again, it IS highly possible that he is a pansy and just feinted, assuming that his unconscious mind is capable of defying gravity and basic principles of balance. Looks to me like he just purposely Threw himself back though.
