North Wales Police chief constable Richard Brunstrom has been zapped with a Taser electronic stun gun.
Richard Brunstrom was Tasered for 1.5 seconds
Mr Brunstrom, 53, offered himself as a target to feel the effects of being shot with 50,000 volts, and was hit for less than two seconds.
Footage on the force's website shows him swearing as he is floored. He warns people who disobey Taser-armed officers they will "not enjoy the consequences".
North Wales Police is expanding the use of Tasers to rural areas.
Under a heading marked "An interesting experience!", Mr Brunstrom's blog described the force's use of the stun gun since 2003 as "a great success".
"We're prepared to use this on members of the public when we have to. It's right and proper that the head of the organisation tries it out for himself," he says.
Video footage shows him being supported by two officers as he is zapped with a Taser by a third officer.
He makes what he described as a "strangulated yell" as he is zapped for 1.5 seconds, and tells his officers: "That was long enough, thanks".
Speaking to camera afterwards, Mr Brunstrom - who recently passed his force's fitness test - said: "What was it like? Not pleasant, is the answer."
He added: "I was completely incapable of movement. I would have fallen if I hadn't been supported by my colleagues.
"I very strongly advise you, if faced by an officer and a Taser, that you follow the instructions of the nice police officer, because you will not enjoy the consequences of disobedience."
Mr Brunstrom's blog said the trial involving the 28 officers in rural areas began last Saturday and the effects of the deployment would be measured "over the next year or so".