You never know when it will happen. Two guys just doing some track welding and then an explosion.
https://www.chicagotribune.com/news/local/breaking/ct-met-explosion-metra-20181103-story.html
Very sad news.
Acetylene and Oxygen can be extremely dangerous if they leak, especially in combination.
Oxy-Acetylene is the most dangerous form of metal working tools. A ‘back fire’ can work its way back to either supply tank and cause an explosion.