Accidents in the laboratory are often the result of carelessness or ignorance either by you or by your neighbors. Stay alert and pay constant attention to your own and to your neighbors' actions.
The hot air coming from a heat gun may be invisible, but you should treat one with the same respect as a blow torch. And be careful where you set it down.
Once you've selected the ideal gloves for your application, you should inspect them for defects before entering into the action. You should check for punctures, signs of cracks, discoloration, etc.