Fire is a combination of

Dark glass screen

In case of arc welding, one should protect his eyes by using dark glass screen.

Welding goggles provide a degree of eye protection while some forms of welding and cutting are being done. They are intended to protect the eyes not only from the heat and optical radiation produced by the welding, such as the intense ultraviolet light produced by an electric arc, but also from sparks or debris.

Safety goggles

While grinding one must use safety goggles. To protect against flying particles when grinding, wear safety glasses with side shields at a minimum. Goggles provide additional eye protection against impact from particles and should be worn along with a face shield to protect the face if exposure to particles will be severe.

Fly away and cause accident

A hammer with loosely fitted handle will fly away and cause accident.

Long enough to make the chest rise

Rescue breath needs to be long enough to make the chest rise.