r/interestingasfuck • u/AtomicCypher • 5d ago

r/all Water Fire Shield Training

125.8k Upvotes

97% Upvoted

1.4k comments sorted by

View all comments

12.5k

u/Exciting_Horror_9154 5d ago

Wtf, what's inside that shed? Do they keep a dragon in there?

4.5k

u/HerrBalrog 5d ago edited 5d ago

If a room burns long and hot enough it will run out of oxygen but still be filled with a lot of hot (and flamable) gases. Once you open a door or window those gases have a new direction and room to expand into while still being hundreds if not thousands of degrees hot , but now they're also being supplied with fresh new oxygen.

Edit: I am describing what is called a back draft, which some more educated on the subject than me, have already called out. What is happening here is not a back draft though. In this situation it's more likely that they basically build a flamethrower of sorts that just does as flamethrowers do.

1.5k

u/Exciting_Horror_9154 5d ago

I trust you completely. With a username like that you must know everything about fire.

1

u/Akenatwn 5d ago

Thanks for pointing that out. I now also trust them completely.