Grinding sparks getting through cracks in the plywood wall and starting a
fire behind. The firemen had a fun time chasing the fire inside the wall.
Grinding sparks and Oxy-acetylene cutting sparks travel great distances.
Welding is relatively safe.
Randy

"SteveF" wrote in message
...
In the thread on the shop carpet the issue of fire from coolant mist on the
walls got me wondering. Being one of the hobby guys in a wood framed
garage, what other not obvious sources of fire have some of you seen?

Steve.