ЁЯУМ
When you smell the gas do not turn on the light, but open all the doors and windows calmly, so that no spark occurs, then close the gas tube and do not turn on the light until the smell of gas completely disappears.
Also do not open the refrigerator if you smell the gas, because it also causes an explosion, and even the suction fan do not switch it on because it has an electrical charge, just open the windows.
(I know you are aware about this but just a gentle reminder)