If your clothing catches fire, you should.
a. stop, drop, and roll.
a. stop, drop, and roll.
Numerous people.... Diabetics who are experiencing nerve degeneration of the extremities (something called Diabetic Neuropathy). Another group would be the elderly, who do loose sensation as age progresses. And lastly those with some sort of paralysis or peripheral nerve damage.
According to statistics, currently there are approximately 22 million drug users living in the United States.