Blow torching food is for the insane. You have to study the injurious effects of burning anything (fuels, paper, candles, etc.) to come to light about how insane is to apply a gas torch to sear your food. Most persons are very ignorant about the thousands of poisonous chemicals produced from the combustion of fosil fuels, or from any combustion.
Source: http://thereviewsearch.com/best-cooking-torch/