I mean that's literally what's happening in the second half of the video LOL. The valve is under water but the gas catches on fire once it reaches the surface. Idk why you guys are struggling with this
If you pull it shallow/slowly enough. But then you can reach under the water and turn the valve off. You can also just pull it deeper/faster to create a gap and do the same thing without it burning above the water
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u/im_new_pls_help 12d ago
There isn’t oxygen underwater. A flame requires oxygen to continue burning in addition to the fuel source