Here is what the human test subject should expect and just one reason why informed consent is necessary.
" 'When it penetrates in, it activates the pain sensors, and you feel a lot of pain,' Garcia said. 'But there's no damage. It truly is a non-lethal device.' " (1)
Reference:
1. Associated Press, in: USA TODAY, "Pentagon unveils new 'non-lethal' weapon," March 02, 2001, www.usatoday.com