Are Tasers responsible for setting people on fire?

It didn't take Lancaster police long to discover a potential danger with their newly issued stun guns: They can set their targets on fire.

One day after officers received Tasers this week, two of them were patting out the flames on Daniel Wood, a 31-year-old homeless man who reportedly had been inhaling a chemical from a spray can to get high. Wood was not seriously injured but was taken to a hospital as a precaution, said Lancaster Police Chief David Bailey.
"Clearly, this is not the way we'd hoped to get started," Bailey said. "But I'm glad "the suspect is OK, and this gives us an opportunity to review how we will do things from this point. CNN reported last month that a man in Australia who had been huffing a chemical poured gasoline on himself as he charged police. An officer used a stun gun, and that man burst into flames and was seriously injured.
And a man died in Texas in 2007 after police hit him with pepper spray and then jolted him with a stun gun, according to published reports.
Authorities in both cases said the men were carrying lighters in their hands, so the source of ignition couldn't be determined for certain.

Link:
http://www.dispatch.com/live/content/local_news/stories/2009/08/19/STUNGUN.ART_ART_08-19-09_A1_DQEQD2T.html?sid=101