I also started the mechanical hacksaw where the buttons were positioned such that as the massive saw moved forward I felt the air move on my forehead.
We had to stop casting after an explosion at a forge in a school elsewhere where it seems they hadn't skimmed the dross properly.
As you know, I've worked in schools for 30yrs. My last school had a great workshop, not used by the kids and I expect sold off now. I can't recall the last time I saw proper flames in a school workshop but thinking back my school must have had near misses every day, and not just when I was in metalwork!!