I dreamt that I'd left the gas fire in the front room on and left the room, and when I came back in it was broken. The pipe that supplies it with gas was broken, and I'd lit the pipe instead of the normal place on the gas fire, and there was a giant yellow flame coming off it right to the ceiling.

I started to panic and tried to turn off the gas, but obviously it didn't work as the pipe was broken before the valve. I blew at the flame and it went out, but there was still a small flame on another part of the gas fire, and I could hear the hissing of the gas coming out of the pipe. I realised it was going to explode and woke up with my heart pounding!