Instead of deploying a taser against an agitated subject, the attending officer simply yells "Imaginary Taser!", takes several steps back, and starts the stopwatch.
According to the theory of "excited delirium", by the time the stopwatch reaches a minute or so, the subject would be unresponsive. And dead shortly after that.
There's no need for tasers.
Leavenworth, Kansas - [46-year-old Edward G. Stephenson] who fought with police Sunday night in Leavenworth was shot with a stun gun several times and ended up dying at a local hospital. ... "He had been combative, head butting and kicking towards officers," said Leavenworth Police Chief Pat Kitchens. "There's a condition called excited delirium that is life-threatening," he said. ... A recording device inside the Taser showed that the officers hit the man three times.[LINK]
They should have used the stopwatch. There wouldn't be so many awkward questions.