Welding / Heat & Brake Cleaner = a deadly combination: read the details at:

http://www.brewracingframes.com/safety-alert-brake-cleaner–phosgene-gas.html

Welding warning for zinc / galvanized metals and other coatings.

https://en.wikipedia.org/wiki/Metal_fume_fever

Noise Induced hearing loss NIHL, head phones are your friend

https://www.nidcd.nih.gov/health/noise-induced-hearing-loss#3