Narrow Gauge At Work

From experience, pockets of gas can collect anywhere round a pithead, if conditions are right (wrong?) particularly close to an entrance/vent.
 
It's the mind, I tell you, it's the mind!!! :rofl::rofl::rofl:
 
Nope I don't think so, isn't that where the wimmin say where all blokes minds are? :giggle::giggle:
 
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